List of Space Marine Chapters

This is a list of official Space Marine Chapters created by Games Workshop. It does not include any fan-created Chapters, though it does include the Chaos Space Marine Traitor Legions and other Renegade Chapters of Chaos Space Marines as well as those Space Marine Chapters considered Excommunicate Traitoris by the High Lords of Terra whether they serve the Dark Gods or not. This is not a complete list as not every Chapter in existence in the Imperium of Man is known. Please note: fan-created Chapters must be posted at the | Warhammer 40k Fanon Wiki and not on this page.

Absolvers
The Absolvers are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Adharon's Reavers
Adharon's Reavers are a vicious warband of Chaos Space Marines who were once largely members of the Sons of Guilliman Chapter of Space Marines.

Adulators
The Adulators are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Alpha Legion
The Alpha Legion is presently a Traitor Legion of Chaos Space Marines who serve Chaos Undivided but they were once a First Founding Legion who were corrupted by the Ruinous Powers of Chaos to fight for the Warmaster Horus after prolonged contact with an alien multispecies organization called the Cabal. Ironically, the Alpha Legion may have turned to Chaos because they believed that by doing so they would best serve the will of the Emperor. As such, the Alpha Legion's true loyalties remain murky and they may be involved in the greatest long-term deception in human history.

Angels Encarmine
The Angels Encarmine are a Second Founding Successor Chapter of the Blood Angels. This Chapter is very rarely at full strength due to their highly active nature and willingness to intervene anywhere in the galaxy to protect the Emperor's people.

Angels Eradicant
The Angels Eradicant is a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Virtually nothing is known about this obscure Chapter within the official Imperial archives.

Angels Penitent
The Angels Penitent are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels Porphyr
The Angels Porphyr are a Loyalist Space Marine Chapter that was Founded during the 31st Millennium, their actual Founding and origin remain unknown.

Angels Sanguine
The Angels Sanguine are a Loyalist Chapter of Space Marines and a Second Founding Successor Chapter of the Blood Angels. Theirs is a long and glorious history, having been pivotal in many victories against the Chaotic horrors that have emerged from the Eye of Terror. Yet the shadow of the Blood Angels' genetic Flaw lingers ever about the Angels Sanguine.

Angels Redeemed
The Angels Redeemed are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels Repentant
The Angels Repentant are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels Resplendent
The Angels Resplendent are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels Revenant
The Angels Revenant are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels Vermillion
The Angels Vermillion is a Second Founding Successor Chapter of the Blood Angels.

Angels of Absolution
The Angels of Absolution is a Second Founding Chapter of the Dark Angels.

Angels of Damnation
The Angels of Damnation are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels of Ecstasy
The Angels of Ecstasy are a Renegade Chapter of Chaos Space Marines devoted to the Chaos God Slaanesh who were once the Loyalist Space Marine Chapter called the Sons of Ulthunas. They rebelled against the Imperium of Man during the action remembered as the Ganymethian Betrayal. It is unclear if they are merely Renegade Space Marines who refuse to recognize Imperial rule or are now fully committed to the service of the Prince of Pleasure as Traitor Marines, though their increasingly mutated appearance and Chapter colour scheme would indicate that this is firmly the case.

Angels of Fire
The Angels of Fire are a Space Marine Chapter of unknown origins founded during the 36th Millennium. They are sometimes confused with the Fire Angels Chapter.

Angels of Flame
The Angels of Flame are a Renegade Chapter of Chaos Space Marines about which little is known in Imperial records. The Angels of Flame Space Marine Chapter only recently turned Renegade in 999.M41, when they were sent on an extended mission of reconquest to the rim of the galaxy near the Ghoul Stars. Even now, Planetary Governors, Imperial Inquisitors and Imperial military commanders in the region wait with trepidation for the bloodshed that will surely follow when they next make an appearance as the newest servants of the Dark Gods.

Angels of Fury
The Angels of Fury are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Their Chapter homeworld is Ingiga in the Segmentum Solar, but almost nothing is known about the Chapter in Imperial records.

Angels of Iron
The Angels of Iron are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Angels of Penance
The Angels of Penance are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels of Purgatory
The Angels of Purgatory are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels of Redemption
The Angels of Redemption is a Second Founding Successor Chapter of the Dark Angels.

Angels of Retribution
The Angels of Retribution are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels of Repentance
The Angels of Repentance are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Angels of Vengeance
The Angels of Vengeance are a Second Founding Successor Chapter of the Dark Angels.

Angels of Vigilance
The Angels of Vigilance are a Loyalist Space Marine Chapter believed to have been created during the Second Founding from an unknown origin.

Apocalypse Company
The Apocalypse Company is a warband of Chaos Space Marines. Their allegiance to a particular Chaos God is unknown, but it is presumed that they worship Chaos in its Undivided form.

Apostles of Contagion
The Apostles of Contagion are a warband of Chaos Space Marines originally drawn from the Death Guard Traitor Legion that dedicate themselves to the service of the Plague Lord Nurgle. They are led by the vile and infamous Chaos Lord Necrosius, the self-proclaimed "Hand of Nurgle." The Apostles of Contagion are thought to be responsible for Plague Zombie infestations that broke out across the Imperial Armoury World of Vraks during the Siege of Vraks in 813.M41.

Apostles of MinthRas
The Apostles of MinthRas are a warband of Chaos Space Marines. They were first encountered by the forces of the Imperium of Man inside the Eye of Terror Warp rift in the 33rd Millennium. Almost nothing else is recorded about them in Imperial records.

Astral Claws
The Astral Claws were once a Space Marine Chapter created during the mid-35th Millennium's 10th Founding from an unknown genetic origin specifically to defend the Eastern Fringes of the Imperium of Man from any Chaos threats spawned by the massive Warp rift called the Maelstrom in the region of the Ultima Segmentum appropriately called the Maelstrom Zone by Imperial astrocartographers. The Astral Claws eventually turned Renegade against the Imperium and initiated the major rebellion and attempt at secession from the Imperium by the Badab Sector appropriately called the Badab War in the late 41st Millennium. Upon losing this conflict to Loyalist Imperial forces, including several other Space Marine Chapters, the surviving Astral Claws were corrupted by Chaos and fled into the Maelstrom. They are currently the leaders of a powerful band of Chaotic pirates and Renegades called the Red Corsairs who present a major threat to Imperial commerce and Imperial worlds in the region.

Astral Fists
The Astral Fists are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is currently known about this Chapter in the Imperial records. Their only notable engagement was when they were ordered to engage the Tyranids Echidna Splinter Fleet sometime during the 41st Millennium.

Astral Knights
The Astral Knights were a Loyalist Space Marine Chapter from an unknown Founding and origin. The Astral Knights sacrificed their entire Chapter in 926.M41 to destroy the hideous threat to the Imperium called the Worldengine in the Vidar Sector. This Necron weapon was a planet-sized spacecraft, armed with Gauss Projectors capable of scorching entire planets of all life on their surface.

Aurora Chapter
The Aurora Chapter is a Loyalist Chapter of Space Marines of disputed Founding that is a Successor Chapter of the Ultramarines. The Armoury of the Chapter boasts more Predators and Land Raiders than any three other Loyalist Space Marine Chapters combined and they are thus specialised in armoured assaults. Their name has become a byword for armoured assault across the Ultima Segmentum of the Imperium of Man that serves as their primary area of operations.

Avenging Sons
The Avenging Sons is a Codex Astartes-compliant Loyalist Space Marines Chapter originally created during the 19th Founding from the gene-seed of the Ultramarines. The Avenging Sons hail from the world of Traekonnis Major.

Avengers
The Avengers are a Loyalist Space Marine Chapter of unknown Founding and origin about which almost nothing is known in Imperial records.

Beasts of Annihilation
The Beasts of Annihilation are a warband of Chaos Space Marines. Corrupted beyond recognition, these once-proud warriors are sworn to the service of the Dark Gods, and allow the daemons of the Warp to possess their superhuman Astartes bodies. As a result, this warband fields an unusually large number of Possessed Chaos Space Marine squads.

Benedictors
The Benedictors are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Berserkers of Skallathrax
The Berserkers of Skallathrax are a large warband of Chaos Space Marines drawn from the World Eaters Traitor Legion. There have been multiple encounters throughout the Segmentum Obscurus between the forces of the Imperium of Man and this vicious warband of Chaos Space Marines dedicated to the Blood God Khorne.

Betrayers of Pain
The Betrayers of Pain are a warband of Chaos Space Marines of unknown origin. Almost nothing is known about them in current Imperial records.

Black Brethren of Ayreas
The Black Brethren of Ayreas are a warband of Chaos Space Marines drawn from the Black Legion who follow the Chaos Champion Ayreas. They were among the Forces of Chaos and the 11 warbands and Renegade Chapters of Chaos Space Marines who participated in the the infamous Siege of Vraks (813-830.M41).

Black Consuls
The Black Consuls are a Loyalist Space Marine Chapter that were a Second Founding Successor or Primogenitor Chapter of the Ultramarines. The Black Consuls were recorded as having been annihilated at the Siege of Goddeth Hive in 455.M41 by elements of the Word Bearers Traitor Legion. Their current status is unknown, though Imperial records indicate that a force of Black Consuls is still operating in the Jericho Reach as part of the Achilus Crusade.

Black Dragons
The Black Dragons are a Loyalist Space Marine Chapter from the Cursed 21st Founding. Their gene-seed is defective and riddled with mutation. Specifically, the Black Dragons' mutated Ossmudula organ can lead to the development of bony crests on the heads and arms of certain Space Marines of the Chapter. The affected Black Dragons Marines are formed into special units known as Dragon Claws.

Black Guard
The Black Guard is a Loyalist Space Marine Chapter and a rare Raven Guard Successor Chapter of the Second Founding. Much of this Chapter's history has been lost to Imperial records. .

Black Inculpators
The Black Inculpators are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Black Templars
The Black Templars are a Loyalist Second Founding Space Marines Chapter derived from the Imperial Fists' gene-seed and their Primarch, Rogal Dorn. Their origin can be traced back to the Imperial Fists’ defence of Terra during the Horus Heresy. Since that time, the Black Templars have been on the longest Crusade the Imperium of Man has ever known to prove their loyalty to the Emperor of Mankind.

Black Wings
The Black Wings are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origins and Founding. Little else is known of this Chapter's history within the Imperial archives.

Blood Angels
The Blood Angels are one of the 20 First Founding Legions of the Space Marines. They are well known for their bloodthirsty nature in battle, and feared for the curse of flawed gene-seed they carry. The Blood Angels are among the longest-lived of the Adeptus Astartes, with some of the Chapter's Space Marines having served the Emperor of Mankind for over a thousand standard years. Thanks to recent events, the Blood Angels' numbers have been severely depleted. Under the threat of extinction, and in order to quickly replenish their numbers, the Blood Angels were forced to ask their kindred Successor Chapters from subsequent Astartes Foundings for a tithe of warriors from the related Chapters' pools of Neophytes, their candidate Space Marines. With these tithes of new recruits, the Blood Angels were more quickly able to replenish their losses, though they still face a time of trial like none the Chapter has known since the days of the Horus Heresy.

Blood Disciples
The Blood Disciples are a warband of Chaos Space Marines who were once the 8th Company of the Emperor's Wolves Chapter of Loyalist Space Marines. During a mission, the 8th Company made a Warp Jump that proved unsuccessful, causing them to be come lost in the Immaterium for decades. During this time the 8th Company was corrupted by Chaos and emerged back into realspace decades later as the vicious warband of Chaos Space Marines known as the Blood Disciples. Because the 8th Company of the Emperor's Wolves had oiginally been designated as one of that Chapter's assault companies, the Blood Disciples possess an unusually large number of Chaos Raptors, the Chaos Space Marines' equivalents of Assault Marines. Due to their chosen name, the warband is very likely dedicated to the service of the Blood God Khorne, but this is not confirmed and the Blood Disciples might also serve Chaos Undivided. Nothing else is known about the warband in Imperial archives.

Blood Drinkers
The Blood Drinkers are a Loyalist Space Marines Chapter and a Second Founding Successor Chapter of the Blood Angels. The name "Blood Drinkers" comes from the Chapter's craving for blood, the result of a mutated omophagea gene-seed organ. The Blood Drinkers Chapter Master is Orloc, who participated alongside his Battle-Brothers in the heroic defence of the Blood Angels' homeworld of Baal from the Forces of Chaos and the Tyranids in 999.M41.

Blood Gorgons
The Blood Gorgons are a Renegade Chapter of Chaos Space Marines that primarily raids the Baston Sector of Imperial space. They are an unusual Chapter of Chaos Space Marines, as every Astartes is ritually bonded to another through the use of a Chaotic ritual. The Blood Gorgons, who value their freedom and independence above all else, refuse to swear allegiance to any patron Chaos God, preferring to serve Chaos in general in the form of Chaos Undivided.

Blood Legion
The Blood Legion are a Loyalist Space Marine Successor Chapter of the Blood Angels that were created during an unknown Founding. Almost nothing is currently known about this Chapter in Imperial records.

Blood Ravens
The Blood Ravens are a Loyalist Space Marine Chapter of unknown origins and Founding. The origins of the Blood Ravens are shrouded in mystery. This elusive Chapter has always been drawn to the pursuit of knowledge and the acquisition of ancient lore and produces an unusually high number of Librarians among its ranks as a high proportion of Neophytes develop psychic abilities soon after their implantation with the Blood Ravens' gene-seed organs. The powerful Blood Ravens Librarians guide the Chapter, enabling them to fight with a precision and calculated fury made possible by their ability to predict and thwart their enemy's strategies and tactics before they come to pass. These arcane powers have led to great speculation and some worry about the true nature and origins of this Chapter in the rest of the Imperium of Man.

Blood Swords
The Blood Swords are a Codex Astartes-compliant Loyalist Space Marine Chapter that was created using the gene-seed of the Blood Angels. The Blood Swords' Founding date is not known. The Blood Swords' homeworld is the planet Jaggafall. The Blood Swords Chapter is unique among the Space Marines in that for a time its Chapter Master, Daggan, was actually a Venerable Dreadnought.

Brazen Claws
The Brazen Claws is a Second Founding Successor Chapter of the Iron Hands.

Brazen Minotaurs
The Brazen Minotaurs is a Loyalist, Codex Astartes-compliant Space Marine Chapter of unknown Founding and origin.

Brazen Skulls
The Brazen Skulls are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records. Their only notable engagement was when they took part in the Sabbat Worlds Crusade fighting in support of the reincarnated Saint Sabbat. The Brazen Skulls were eventually wiped out as a Chapter by 773.M41.

Brotherhood of Darkness
The Brotherhood of Darkness are a warband of Chaos Space Marines of unknown origin and allegiance.

Brotherhood of a Thousand
The Brotherhood of a Thousand is a Loyalist Codex Astartes-compliant Chapter of unknown origin and Founding.

Brothers Penitent
The Brothers Penitent is one of the Loyalist Space Marine Chapters Founded as part of the Astartes Praeses - one of the 20 Chapters of Astartes mentioned in the ancient tome known as the Mythos Angelica Mortis that was created to defend the regions surrounding the Eye of Terror in the Segmentum Obscurus from the Forces of Chaos. The Brothers Penitent are of an unknown Founding and origin. Though this Chapter works alongside those of the Astartes Praeses, they have a reputation for being insular in nature.

Carcharodons
The Carcharodons are a Loyalist Space Marines Chapter who participated in the latter stages of the Badab War. They are a fleet-based Chapter. The Carcharodons may actually be the same Chapter as the Space Sharks; the term Carcharodons may simply be an alternate name for that unit of Astartes.

Celebrants
The Celebrants Chapter was founded during the 36th Millennium.

Celestial Lions
The Celestial Lions were founded during the 38th Millennium. Their homeworld is Elysium IX.

Charnel Guard
The Charnel Guard are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records other than the participation in the defence of the Maelstrom Zone from the Chaos Renegades of the nearby Warp rift of the same name.

Children of Purgatos
The Children of Purgatos are a Renegade Chapter of Chaos Space Marines of unknown Founding and origin, declared Excommunicate Traitoris by the Inquisition.

Consecrators
The Consecrators is a Successor Chapter of Loyalist Space Marines created from the gene-seed of the Dark Angels.

Contenders
The Contenders are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Crimson Castellans
The Crimson Castellans were a Loyalist Space Marine Chapter of unknown origins and Founding who became embroiled in a civil war after a portion of their number turned to Chaos but were largely destroyed when the Tyranid Hive Fleet Jormungandr unexpectedly descended upon the world of Sephrax where they were battling their Renegade brethren. The Chapter homeworld of Vorl Secundus was subsequently abandoned and it is unknown whether the Chapter still exists in some form.

Crimson Consuls
The Crimson Consuls are a Loyalist Space Marine Chapter of unknown Founding who are a Successor Chapter of the Ultramarines. They were destroyed entirely by the machinations of the Alpha Legion Chaos Space Marines, possibly on the orders of Alpharius (or Omegon masquerading as Alpharius) himself.

Crimson Fists
The Crimson Fists are one of the Successor Chapters created during the Second Founding, drawn from the Imperial Fists Legion. Though they remain understrength from the Ork invasion of Rynn's World, the Crimson Fists are a proud and stubborn Chapter, never admitting defeat.

Crimson Guard
The Crimson Guard is a Codex Astartes-compliant Space Marine Chapter.

Crimson Paladins
The Crimson Paladins is a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Virtually nothing is known about this obscure Chapter within the official Imperial archives, except the name of the Chapter's homeworld of Fortress and their fortress-monastery, which is known as Honour Hold. Much of this fortress is below ground as added protection against orbital strikes.

Crimson Shades
The Crimson Shades is a Loyalist Space Marine Chapter of unknown origin and Founding. Virtually nothing is currently known about this obscure Chapter within official Imperial records. The Librarians of the Crimson Shades, like their counterparts of the Space Wolves and the White Scars Chapters, are one of the noteworthy examples that take exception to the doctrines of the Codex Astartes. Though the role of this Chapter's Librarians is not so different from the traditional role found for Librarians in more orthodox Chapters, it is in the methods they employ that they differ significantly from the majority of the Adeptus Astartes. Exactly what this difference is has not yet been recorded.

Crimson Scions
The Crimson Scions are a Loyalist Space Marine Chapter of unknown origins and Founding. Virtually nothing is known about this obscure Chapter within the official Imperial archives, except that they are located near the Imperial Hive World of Minea within the Segmentum Ultima.

Crimson Scythes
The Crimson Scythes are one of the Loyalist Space Marine Chapters Founded as part of the Astartes Praeses - one of the 20 Chapters of Astartes mentioned in the ancient tome known as the Mythos Angelica Mortis that was created to defend the regions surrounding the Eye of Terror in the Segmentum Obscurus from the Forces of Chaos. The Crimson Scythes are of an unknown Founding and origin.

Crusaders
The Crusaders are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Damned Company of Lord Caustos
The Damned Company of Lord Caustos is a group of Space Marines that turned to the Chaos Gods after they were declared Traitor by an Inquisitor of the Ordo Hereticus.

Dark Angels
The Dark Angels are considered among the most sinister and secretive of the Loyalist Space Marine Chapters and were one of the First Founding Space Marine Legions.

Dark Crusaders
The Dark Crusaders are a Loyalist Space Marine Chapter of unknown origins and Founding. Nothing else is currently known about them in Imperial records.

Dark Eagles
The Dark Eagles are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Unfortunately, at this time almost nothing is known about the Chapter beyond their name and Chapter appearance.

Dark Hands
The Dark Hands is a Codex Astartes-compliant Chapter of unknown origins.

Dark Hunters
The Dark Hunters is a Space Marine chapter of unknown founding date or origin.

Dark Sons
The Dark Sons is a Space Marine chapter of unknown founding date or origin.

Dark Tusks
The Dark Tusks Chaos Space Marines are a Renegade Chapter or a simple warband of Chaos Space Marines apparently sworn to the service of Nurgle. The Dark Tusks served as mercenaries in the Halo Stars,often serving the agenda of those with nefarious or Chaotic agendas. Evidence suggests the Dark Tusks are followers of Nurgle, but they were encountered, by Squad Damocles of the Iron Snakes Chapter of Space Marines, fighting alongside a Chaos Cult dedicated to Tzeentch, the Chaos God of Sorcery, on the world of Rosetta. The Dark Tusks wore corroded, rotten Power Armour and smelled of putrescence, decayed flesh and disease. They also carried an array of daemon weapons and "plague weapons". Unlike the majority of Dark Tusks, the leader wore shiny, uncorroded black armour with chain looped about him. The Dark Tusks are described as so degraded in their actions that they were more like animals than men when they were cornered by a Kill-team of the Iron Snakes on Rosetta.

Death Eagles
The Death Eagles are a Loyalist, Codex Astartes-compliant Space Marine Chapter. It is suspected that they are one of the rare Successor Chapters of the Raven Guard. Their exact Founding date is unknown. Unfortunately, at this time almost nothing is currently known about the Chapter in Imperial records beyond their name and Chapter appearance.

Death Guard
A First Founding Space Marine Legion, the Death Guard are one of the nine Traitor Space Marine Legions which betrayed the Emperor during the Horus Heresy, becoming Chaos Space Marines who now serve the Chaos God Nurgle exclusively. Upon first seeing them, their Primarch Mortarion told them, "You are my unbroken blades. You are the Death Guard."

Death Spectres
The Death Spectres is a Chapter of Space Marines that participated in the Siege of Lelithar and the defence of the Cadian Sector against the 13th Black Crusade.

Death Strike
The Death Strike Chapter participated in the Assault on Moros and acted as the rearguard during the Verdan II Extraction.

Deathwatch
The Deathwatch are not an actual Space Marine Chapter. Instead, they are comprised of kill-squads formed from the veteran Space Marines of other Chapters and serve as the Chamber Militant of the Ordo Xenos of the Imperial Inquisition.

Destroyers
The Destroyers are a Loyalist Space Marine Chapter and a rare Second Founding Successor Chapter of the White Scars. Nothing else is recorded about the Chapter in Imperial records.

Desert Lions
The Desert Lions are a Loyalist Space Marine Chapter of unknown origin and Founding who fought in Operation Carthage during the 31st Millennium to retake the world of Istvaan V from the Forces of Chaos who had controlled it since the first days of the Horus Heresy. Nothing else is known about the Chapter in Imperial records.

Dictators
The Dictators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Disciples of Caliban
The Disciples of Caliban are a Successor Chapter of the Dark Angels Legion, created late in the 37th Millennium.

Doom Eagles
The Doom Eagles are a Primogenitor, or Second Founding Successor Chapter of the Ultramarines. (Codex Ultramarines, 2nd Edition)

Doom Legion
The Doom Legion is a Space Marine Chapter of unknown founding date or origin.

Doom Warriors
The Doom Warriors is a Codex Astartes-compliant Chapter of unknown founding and origin.

Dragon Lords
The Dragon Lords are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. In 998.M41 all contact was lost with the Dragon Lords' Chapter planet, Erwynn's World. This bodes ill for the Dragon Lords until their ultimate fate can be determined.

Dragon Warriors
The Dragon Warriors are a warband of Chaos Space Marines dedicated to the Blood God Khorne who were originally Renegade Space Marines from the 6th Company of the Salamanders Chapter. Captain Terellus of the Salamanders' 6th Company led his warriors to betray the Chapter and the Emperor of Mankind and swear their loyalty instead to the Chaos God Khorne. The Dragon Warriors are specialists in short-range fire fights and melee combat, like all Khornate warbands. They also prefer the use of Melta and Flame Weapons.

Emperor's Children
The Emperor's Children Traitor Legion is one of the First Founding Space Marine Legions that turned to Chaos during the Horus Heresy and later became Chaos Space Marines wholly devoted to the service of the Prince of Chaos, Slaanesh.

Eagle Warriors
The Eagle Warriors are a fleet-based Progenitor (Second Founding) Successor Chapter of the Ultramarines.

Emperor's Hands
The Emperor's Hands are a Codex Astartes-compliant Space Marine Chapter.

Emperor's Hawks
The Emperor's Hawks is a Codex Astartes-compliant Chapter of unknown origin and founding.

Emperor's Shadows
The Emperor's Shadows are a Successor Chapter created using the gene-seed of the Iron Hands.

Emperor's Spears
The Emperor's Spears are a Loyalist Space Marine Chapter of unknown origin and Founding.

Emperor's Swords
The Emperor's Swords are a Chapter of unknown founding and origin. The Chapter was decimated by the Alpha Legion Traitor Space Marines.

Emperor's Wrath
The Emperor's Wrath Space Marines Chapter is based in Segmentum Solar. They are a Loyalist Chapter of unknown origin and Founding. Their homeworld is in a star system where there are no planets, only asteroids. This system contains three asteroids that have been hollowed out and made into three massive hive cities. This is where the Chapter recruits new members. This Chapter has a deep hatred for xenos like the Tyranids and the Orks. The Emperor's Wrath has purged many Ork-held star systems using the Exterminatus. The Chapter has done the same on many worlds that have fallen to the various Tyranid Hive Fleets. Some of the worlds purged still had large numbers of Imperial forces on them. The Chapter Master and the First, Second and Third Company are currently on a crusade against the forces of Chaos who have occupied a portion of the world of Cadia following Abbadon's 13th Black Crusade against the Imperium.

Emperor's Warbringers
The Emperor's Warbringers Space Marine Chapter wear a gray-green power armor, with crossed swords as its badge.

Emperor's Wolves
The Emperor's Wolves are a Loyalist Space Marine Chapter of unknown origin and Founding whose gene-seed contain altered and integrated wolf genes similar to those found in the gene-seed of the Space Wolves, though any further connection between the Chapters remains unknown. The Emperor's Wolves lost their 8th Company in the Warp who reemerged decades later as the warband of Chaos Space Marines known as the Blood Disciples. Nothing else is known about the Chapter in Imperial records.

Espandors
The Espandors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Excoriators
The Excoriators are a Codex Astartes-compliant Chapter of unknown founding and origin.

Excubants
The Excubants are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Execrators
The Execrators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Executioners
The Executioners were one of four chapters that rebelled during the Badab War.

Exemplars
The Exemplars are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Exorcists
The Exorcists were created during the 13th Founding, the so-called "Dark Founding" which occurred sometime between the 35th and 36th Millennia, before the start of the Age of Apostasy. The Exorcists were founded as part of a highly-classified Imperial experiment to create Space Marines who were unusually resistant to daemonic possession and Chaotic corruption because as part of their initiation into the Chapter they had actually been forced to serve as daemonhosts for a short time before having the creature expelled back to the Warp by the intervention of an Inquisitor.

Exsanguinators
The Exsanguinators are a Loyalist Space Marine Successor Chapter of the Blood Angels, created during an unknown Founding. Almost nothing is known about this Chapter in Imperial records. Created as they were from the Blood Angels' gene-seed, they too, carry the genetic Flaws inherited from Sanguinius. Like many of their contemporary Successor Chapters founded in later centuries, the Exsanguinators were greatly affected by the Black Rage and like the Flesh Eaters, they too, are a shrinking Chapter as the Flaw begins to whittle down their numbers.

Extinction Angels
One of the Successor Space Marine Chapters that turned to Chaos after the Horus Heresy, the Chapter is famous for its assault skill.

Fire Angels
The Fire Angels are a Loyalist Space Marines Chapter created during the 25th Founding of the 40th Millennium from the gene-seed of the Ultramarines. The Fire Angels are best remembered in Imperial records for the role they placed in the recent Badab War, a rebellion by several Space Marine Chapters against the Imperium of Man.

Fire Hawks
The Fire Hawks were one of the Space Marine Chapters created during the Cursed 21st Founding, from the Ultramarines' gene-seed.

Fire Lords
The Fire Lords is a Codex Astartes-compliant Chapter. Their founding date has not been established.

Flame Eagles
The Flame Eagles are a Loyalist, Codex Astartes-compliant Space Marine Chapter. It is suspected that they are one of the rare Successor Chapters of the Raven Guard. Their exact Founding date is unknown. Unfortunately, at this time almost nothing is currently known about the Chapter in Imperial records beyond their name and Chapter appearance.

Flame Falcons
The Flame Falcons was one of the cursed Space Marine Chapters created during the Cursed 21st Founding.

Flawless Host
The Flawless Host is a Chaos Space Marine warband, believed to be a splinter group of the Emperor's Children Traitor Legion (or at least a warband utilizing their gene-seed).

Flesh Eaters
The Flesh Eaters are a Third Founding Successor Chapter of the Blood Angels.

Flesh Tearers
The Flesh Tearers are a Second Founding Successor Chapter of the Blood Angels.

Genesis Chapter
The Genesis Chapter is a Second Founding Successor Chapter of the Ultramarines.

Golden Gryphons
The Golden Gryphons are a Loyalist Chapter of Codex Astartes-compliant Space Marines of unknown Founding and origin. Nothing else is known about them in Imperial records.

Golden Halos
The Golden Halos are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records other than that they were engaged in such notable campaigns as: Kistvaen, Podzul, and the decades-long Siege of Nectocalyx, which was colloquially referred to as "The Meatgrinder."

Grey Knights
The Grey Knights Space Marine Chapter acts as the Chamber Militant of the Ordo Malleus, the daemon-hunting branch of the Imperial Inquisition. Their fortress-monastery is located on Titan, the largest moon of Saturn in the Sol System. Every Grey Knight Marine is also a psyker, which makes it all the more remarkable that no Grey Knight has ever turned to Chaos.

Grey Slayers
The Grey Slayers are a Loyalist Space Marines Chapter of unknown origin and Founding that became corrupted by Chaos. Inquisitor Thrax purged the Chapter of mutants and daemons, and the Chapter Master took his own life in shame. Untainted officers were raised up to lead the Chapter. The purge was apparently not quite thorough enough, as Inquisitor Thrax himself was soon afterwards corrupted by the Ruinous Powers and transformed into some sort of daemonic Chaos beast. The Grey Slayers' eventual disposition and fate remains unknown in current Imperial records.

Grief Bringers
The Grief Bringers are a Loyalist Space Marine Chapter of unknown origins and Founding that suffered heavy losses fighting against the Warp entities called Enslavers on the world of Valhall II. Their armour is described as "principally a sickly pea-green, with engrailed chevrons of headachey purple."

Guardians of the Covenant
The Guardians of the Covenant is a Successor Chapter of the Dark Angels, of an unknown founding.

Halo Dragons
The Halo Dragons are a Loyalist Space Marine Chapter of unknown origins and Founding who played an instrumental role in containing the Tau's Third Sphere Expansion during the Zeist Campaign of 999.M41. Little else is known about them in Imperial records.

Hammers of Dorn
The Hammers of Dorn are a Loyalist Space Marine Chapter and a Successor Chapter of the Imperial Fists.

Hammers of Retribution
The Hammers of Retribution are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Hawk Lords
The Hawk Lords are a Codex Astartes-compliant Chapter of unknown origin whose Power Armour is coloured purple with gold trim and chest eagle.

Heralds of Ultramar
The Heralds of Ultramar are a Codex Astartes-compliant Chapter derived from the Ultramarines.

Heralds of Vengeance
The Heralds of Vengeance are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Honoured Sons
The Honoured Sons are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records except for the name of their homeworld of Jonol, located in the Eastern Fringes of the Segmentum Ultima.

Hospitallers
The Hospitallers are a non-Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in current Imperial records.

Hounds of Demos
The Hounds of Demos are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Howling Griffons
The Howling Griffons are a Codex Astartes-compliant who trace their origin from the Ultramarines.

Immortal Hearts
The Immortal Hearts are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Imperial Castellans
The Imperial Castellans are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is currently known about this Chapter in Imperial records.

Imperial Fists
The Imperial Fists Chapter was formed from the Imperial Fists Space Marine Legion, the VII Legion of the First Founding. They are considered the greatest practicioners of siege warfare in the Imperium of Man.

Imperial Harbingers
The Imperial Harbingers hail from the world of Birmingham ("the Black Planet") and are specialists at drop assaults.

Imperial Hawks
The Imperial Hawks are a Loyalist Space Marine Chapter of unknown origin and Founding. They specialise in fast attacks from the air, utilising high-altitude Jump Pack-assisted assaults, followed by reinforcement sorties from squadron-strength units of Land Speeders, often dropped at altitude and at high-speed from Thunderhawk gunships. Almost nothing else is known about the Chapter in Imperial records.

Imperial Paladins
The Imperial Paladins are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Unfortunately nothing more is currently known about them in Imperial records.

Imperial Ravagers
The Imperial Ravagers' fortress-monastery is a space station that orbits the world of Vindict V. They were summoned to perform Exterminatus upon the planet Stalinvast in The Inquisition War trilogy novel Draco.

Imperial Stars
The Imperial Stars are a Codex Astartes-compliant Space Marine Chapter.

Imperial Talons
The Imperial Talons are a Loyalist, Codex Astartes-compliant Space Marine Chapter. It is suspected that they are one of the rare Successor Chapters of the Raven Guard. Their exact Founding date is unknown. Unfortunately, at this time almost nothing is currently known about the Chapter in Imperial records beyond their name and Chapter appearance.

Inceptors
The Inceptors are a Loyalist Codex Astartes-compliant Space Marine Chapter. They are a Second Founding Successor Chapter of the Ultramarines Legion. Little is known of this Chapter's history within the Imperial archives, except there involvement in a regrettable incident during the Macharian Heresy in the early years of the 41st Millennium.

Inculcators
The Inculcators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Interceptors
The Interceptors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Invaders
The Invaders are a Loyalist Codex Astartes-compliant Space Marines Chapter of unknown Founding and origin. Their Chapter homeworld of Ogrys was lost to an assault by the Eldar of Craftworld Alaitoc approximately a standard century ago and the Invaders have been forced to become a Fleet-based Chapter while they rebuild their strength from the heavy losses they suffered against the vengeful xenos.

Invictors
The Invictors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Inviolators
The Inviolators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Iron Champions
The Iron Champions are a Space Marine Chapter of unknown origin and founding date.

Iron Crusaders
The Iron Crusaders are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. The Iron Crusaders were last seen in 998.M41 heading towards the forbidden region of space known as the Ghoul Stars.

Iron Fists
The Iron Fists are a Successor Chapter of the Iron Hands Legion of unknown founding.

Iron Hands
The Iron Hands are one of the initial First Founding Space Marine Legions.

Iron Hearts
The Iron Hearts were briefly mentioned in the short story "Hell in a Bottle" by Simon Jowett published in Let the Galaxy Burn. Their Primarch is mentioned as "Primarch Rubineck", possibly one of the unknown Primarchs listed in the Space Marine codexes. The removal of this Chapter's name may be the result of the content of the short story where at its end a Chaos Daemon Lord gains entrance to the Chapter's training centre via the body of a failed Space Marine. Further canon disregards the use of the name of the Primarch and goes on to state that the Chapter was all but annihilated fighting the Daemon Lord who manifested in their star system. Only two companies, the Sixth and Tenth, remain at full strength.

Iron Knights
The Iron Knights are a Second Founding Successor Chapter of the Imperial Fists. The Iron Knights were one of the many Loyalist Space Marine Chapters who participated in the defence of Cadia from Abaddon the Despoiler's offensive during the Thirteenth Black Crusade.

Iron Lords
The Iron Lords are a Loyalist, Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding who have played major roles in combating the Barghesi, the Tyranids and the Tau.

Iron Shield
The Iron Shield is a Loyalist Space Marine Chapter of unknown Founding and origin. Much of this Chapter's history has been lost and is not recorded in Imperial records.

Iron Snakes
The Iron Snakes is a Second Founding Chapter of unknown origin. The Iron Snakes are tasked with protecting the Reef Stars. The novel Brothers of the Snake by Dan Abnett, is mostly about the exploits of the Iron Snakes' Damocles Squad. The Iron Snakes were one of the many Space Marine Chapters who participated in the defense against the Thirteenth Black Crusade.

Iron Talons
The Iron Talons are one of the Loyalist Space Marine Chapters Founded as part of the Astartes Praeses - one of the 20 Chapters of Astartes mentioned in the ancient tome known as the Mythos Angelica Mortis that was created to defend the regions surrounding the Eye of Terror in the Segmentum Obscurus from the Forces of Chaos. The Iron Talons were Founded using White Scars gene-stock during an unknown Founding.

Iron Warriors
The Iron Warriors were a First Founding Space Marine Legion that turned Traitor, pledged themselves to Chaos and fought against the Imperium during the Horus Heresy.

J
No known Chapters' names begin with the letter "J."

Knights of Blood
The Knights of Blood are a currently Renegade Space Marines Chapter who were declared Renegades and Excommunicate Traitoris by the High Lords of Terra on the advice of the Inquisition because of the terrible destruction they wrought against friends and foes alike, yet the Knights of Blood still consider themselves to be loyal to the Emperor of Mankind, if not to his Imperium. The Knights of Blood are a Successor Chapter of the Blood Angels, created during an unknown Founding.

Knights of Dorn
The Knights of Dorn are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding. They were created from the gene-seed of the Imperial Fists. Almost nothing is known about this Chapter in current Imperial records.

Knights of Eternity
The Knights of Eternity are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. In 990.M41, Hive Fleet Kraken attacked across a large front of Imperial space that covered many thousands of light years. Several Space Marine Chapters dedicated their forces to saving the worlds that other Imperial armies had abandoned. The Knights of Eternity were one of those Chapters, selling their lives dearly in the defence of the Imperium against the predations of the Great Devourer. They are presumed to have been completely obliterated.

Knights of Gryphonne
The Knights of Gryphonne were a Codex Astartes-compliant Chapter of unknown origin and founding date.

Knights of the Raven
The Knights of the Raven are a Codex Astartes-compliant Space Marine Chapter of unknown founding date.

Knights Sanguine
The Knights Sanguine are a Loyalist Space Marine Successor Chapter of the Blood Angels, created during an unknown Founding. Almost nothing is known about this Chapter in Imperial records. Created as they were from the Blood Angels' gene-seed, they too, carry the heirs of Sanguinius' genetic Flaws, the Red Thirst and the Black Rage. Like many of their contemporary Blood Angels Successor Chapters founded in later centuries, the Knights Sanguine were greatly affected by the Flaw and their numbers were increasingly consumed by the Black Rage.

Knights Unyielding
The Knights Unyielding is one of the Loyalist Space Marine Chapters Founded as part of the Astartes Praeses - one of the 20 Chapters of Astartes mentioned in the ancient tome known as the Mythos Angelica Mortis that was created to defend the regions surrounding the Eye of Terror in the Segmentum Obscurus from the Forces of Chaos. The Knights Unyielding are of an unknown Founding and origin.

Lamenters
The Lamenters are an unfortunate Chapter of Space Marines who took part, on the losing side, in the Badab War, before being devastated by the Tyranids.

Legion of the Damned (Fire Hawks)
The Legion of the Damned are the most famous of the Chapters of the Cursed 21st Founding and were once known as the Fire Hawks. The Fire Hawks were listed as officially destroyed as a Chapter in Imperial records even though some of their members sometimes appear on Imperial battlefields as the Legion of the Dead when the situation for other Imperial forces is dire, and their intervention turns the tide of battle. Many claim to have seen these living spectres in battle, but no thanks can ever be given to them, for they leave as suddenly and as quickly as they appeared.

Legion of Night
The Legion of Night are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. This Chapter hails from the world of Outrenacht. The only thing known with any certainty about these Astartes is that the Legion of Night's combat doctrine revolves around the use of Tactical Squads that utilise the Chapter's large pool of armoured transports. These are used to perform surgical strikes or seize strategic points with the aid of fast-moving Razorbacks or Rhinos. Like their fellow Chapters the Angels of Fury and the Raven Guard, the Legion of Night has forged their combat doctrine around such highly mobile insurgent tactics.


 * See also Fire Hawks

Libators
The Libators are a Loyalist Space Marine Chapter who are a Second Founding Successor Chapter of the Ultramarines. Nothing else is currently known about them in the Imperial record.

Liberators
The Liberators are a Loyalist Space Marines Chapter of the Imperium of Man and a Second Founding Successor Chapter of the Ultramarines. Their one peculiarity compared to most other fully Codex Astartes-compliant Space Marine Chapters is that their basic weapon for Tactical Marines of the Chapter is the Storm Bolter. Other than this, very little is currently known about the Liberators in Imperial records.

Lion Warriors
The Lion Warriors are a Codex Astartes-compliant Space Marine Chapter of unknown origin. {C}

Lords of Decay
The Lords of Decay are a warband of Chaos Space Marines originally drawn from the Death Guard Traitor Legion though they have grown large by recruiting members of the other Traitor Legions and Renegade Space Marine Chapters dedicated to Nurgle who have deemed their commanders' attitude towards the Imperium of Man in general and the defence of Terra in particular to be too fearful. The Lords of Decay are known to have been led for a time by the Daemon Primarch Mortarion himself. The Lords of Decay are known to be the only Chaos Space Marine warband in existence to have attempted a direct attack on the Solar System and to have ever defeated a member of the Adeptus Custodes in combat since the Horus Heresy. They were also heavily involved in assisting the Forces of Chaos during the terrible Siege of Vraks. The Lords of Decay are primarily composed of Plague Marines.

Lords of Wrath
The Lords of Wrath are a Loyalist Space Marine Chapter of unknown origin and Founding. Almost nothing about them is known in Imperial records. The Lords of Wrath are recorded in Imperial records as having participated in the capture of Decius Mus, the Arch-Heretic of Auscum, with assistance from the 23rd Bruttiam Regiment of the Imperial Guard.

Luna Wolves
The Luna Wolves are one of the First Founding Space Marine Legions and were led by their Primarch, the Warmaster Horus. After Horus was promoted to the rank of Warmaster so that he could lead the Great Crusade in the Emperor's absence when he returned to Terra, they were renamed the Sons of Horus''. ''They led their fellow Traitor Space Marine Legions to Terra during the climax of the Horus Heresy where they carried out the infamous Siege of the Imperial Palace. When Horus was killed at the hands of the Emperor, the Sons of Horus fled into the Eye of Terror where they took on yet another name: the Black Legion. Today, the Black Legion is led by Horus' self-proclaimed successor, Abaddon the Despoiler.

Malevolent
The Malevolent are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Mantis Warriors (Mantis Legion)
Sometimes referred to as the Mantis Legion in older texts, the Mantis Warriors was one of the three Astartes Chapters that joined the Astral Claws in rebelling during the Badab War. For their sins, they have been required to give up their homeworld and pursue the Emperor's forgiveness by defending the Imperium from their fleet without recruiting new members until their penance has been earned and their disgrace erased. This restriction was raised after the Mantis Warriors proved critical in throwing back the attach of a Tyranid splinter Hive Fleet from the strategically-placed Imperial world of Herodian IV

Marauders
The Marauders are a Loyalist Space Marines Chapter and a Second Founding Successor Chapter of the White Scars according to the Apocrypha of Davio, written in the 33rd Millennium. Little else is known about them in Imperial records save that the Mantis Warriors Chapter, which grew infamous during the Badab War, was created from the gene-seed of the Marauders.

Marines Errant
The Marines Errant is a fleet-based Space Marine Chapter of unknown origin.

Marines Errantor
The Marines Errantor are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Marines Exemplar
The Marines Exemplar is one of the Chapters founded to make up the Astartes Praeses, the twenty Chapters created to guard the regions surrounding the Eye of Terror.

Marines Malevolent
The Marines Malevolent Chapter was founded in the 32nd Millennium.

Marines Vindicant
The Marines Vindicant are a Loyalist Space Marine Chapter of unknown origin and Founding. Almost nothing else is known about the Chapter in Imperial records save that they played a major role in the scouring of the world of Vorlinghast in 981.M41, which had been overrun by Plague Zombies and the Death Guard Traitor Legion.

Masters of Proteus
The Masters of Proteus are a Space Marine Chapter of unknown founding.

Mentors
Often referred to as the Mentor Legion. The Mentors are a 26th Founding Chapter and are the second Chapter to be designated number 888 (the first one being the destroyed Star Scorpions).

Metamarines
The Metamarines are a Space Marine Chapter that participated in the 13th Black Crusade.

Minotaurs
That there existed a Loyalist Space Marine Chapter called the Minotaurs, created during the Cursed 21st Founding of the 36th Millennium, is not widely contested in the Imperial record, but whether or not they are the same as the Chapter bearing the name that took part in the suppression of the Macharian Heresy in the opening decades of the 41st Millennium (and the same Chapter that would later go on to play a crucial and bloody role in the Badab War) is not so certain. The Minotaurs possess a reputation for being unusually xenophobic Astartes, even for the Imperium, as well as often unreliable combatants who do not work well with other Imperial military units.

Mortifactors
The Mortifactors are a Chapter founded during the 40th Millennium from Ultramarines' gene-seed.

The Nameless
The Nameless are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Nemesis
The Nemesis Chapter is a Loyalist Codex Astartes-compliant Space Marine Chapter. They are a Second Founding Successor Chapter of the Ultramarines Legion. Little is known of this Chapter's history within the Imperial archives.

Night Hawks
The Night Hawks are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records, other than their participation in the Angarius Incursion in the late 41st Millennium.

Night Watch
The Night Watch is one of the Chapters founded to make up the Astartes Praeses, the twenty Chapters created to specifically guard the regions of the Imperium surrounding the Eye of Terror.

Novamarines
The Novamarines is a Second Founding Successor Chapter of the Ultramarines. The Novamarines are scattered throughout the galaxy, and have not fought together as a Chapter since the early years of the 37th Millennium.

Oblators
The Oblators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Omega Marines
A Space Marines Chapter of unknown origin or founding raised during the 40th Millennium.

Oracles of Change
The Oracles of Change is a warband of Chaos Space Marines drawn from an unknown Chapter and dedicated to the service of Tzeentch. The Oracles are lead by the Chaos Sorcerer Amadeus Volkstein, who was once a Loyalist Librarian Epistolary before being corrupted by the promise of knowledge and power offered by the Lord of Change.

Panthers
The Panthers are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Patriarchs of Ulixis
The Patriarchs of Ulixis are a Loyalist Codex Astartes-compliant Space Marine Chapter. They are a Second Founding Successor Chapter of the Ultramarines Legion. Little is known of this Chapter's history within the Imperial archives.

Penitents
The Penitents are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Praetors of Orpheus
The Praetors of Orpheus is a Second Founding Successor Chapter of the Ultramarines.

The Pyre
The Pyre is a Chapter of Chaos Space Marines that was formerly a Loyalist Chapter given the task of combating Chaos around the Eye of Terror who were ultimately corrupted by Chaos and turned Traitor themselves.

Punishers
The Punishers are a Chaos Space Marine warband. There is little else known about them in Imperial records.

Purgators
The Purgators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Purge, The
The Purge is a Chaos Space Marine warband dedicated to the Chaos God Nurgle, the Plague Lord. They despise life in all its forms and have waged war against aliens and Mankind alike across the 3000 standard years since their founding in the 38th Millennium, though their origin remains unknown. They aim to exterminate all known life in the galaxy in service to Nurgle in his aspect as the Lord of Death. When The Purge attack a world, famine, pestilence and death soon follow. They are infamous for their conduct of genocidal campaigns and the indiscriminate use of chemical weapons on civilian and military targets alike. They recently played a major role in defending the other Forces of Chaos during the Siege of Vraks by the Imperial Guard. Their current location is unknown.

Purple Stars
The Purple Stars are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. They are rumoured to have close ties with the Adeptus Mechanicus and the Inquisition. Sometime during the 32nd Millennium, at the behest of Technomagos Ipsissimus and an unidentified emissary of the Inquisitorial Representative of the High Lords of Terra, the Purple Stars sent Epistolary Merchstrumer and half a squad of Battle-Brothers (5 Astartes) into the Eye of Terror to carry out a clandestine reconnaissance mission. But their presence did not go unnoticed for long, and soon the Purple Stars found their null ship being boarded by a large force of Chaos Space Marines. Severely outnumbered and running low on ammunition, the Purple Stars prepared to sell their lives dearly, attacking the Traitor Marines with Chainswords and Power Axes in a futile attempt to repel them. The Purple Stars Astartes were wiped out, with the exception of two lone survivors: one was the Purple Stars Librarian Merchsturmer and the other was the ship's Astropath. Though mortally wounded, the Librarian had managed to acquire his fallen Battle-Brothers' Progenoid Glands, to be implanted into a future generation of Purple Stars Astartes. Before dying, Mechsturmer passed on a dire warning to the Imperium of Man: the the latest Black Crusade of Abaddon the Despoiler was fast approaching.

Q
No known Chapters' names begin with the letter "Q."

Rainbow Warriors
The Rainbow Warriors are a Loyalist Space Marine Chapter of unknown origin and Founding of which there is almost no further mention in Imperial records. The Chapter's homeworld is called Prism. It should also be noted that in official Imperial records of Space Marine Chapter Homeworlds there is a map showing the locations of different Space Marine Chapters. There is one planet on this map where in the place of a Chapter name, it says "record deleted". By looking closely, it is clear that this deleted Chapter's badge is that of the Rainbow Warriors.

Rampagers
The Rampagers are a Loyalist Space Marine Chapter and a Second Founding Successor Chapter of the White Scars. Like their progenitors, the Rampagers make use of ritual facial scarring to denote both the rank and achievements of Astartes in the Chapter. These scars are applied during a long, sacred Chapter ceremony called the Blooding. The blood drawn from the faces of the Space Marines during this ritual is then mixed with the drinks served during the feast that always follows the completion of the ceremony

Raptors
The Raptors are a Loyalist Second Founding Successor Space Marine Chapter of the Raven Guard. They have been heavily involved in many of the most recent campaigns of the Imperium of Man, including the Badab War, the Third War for Armageddon and the Taros Campaign. The Raptors were originally and mistakenly recorded in Imperial records as a Chapter called the Raptor Legion with a very different colour scheme; this mistake has now been rectified. As a Chapter, the Raptors have been nearly rendered extinct multiple times, but have learned to adapt to changing circumstances so well that they have flourished where other Chapters would simply have had their names added to the ranks of the fallen. The Raptors' Chapter culture is one that is very wary of the idea of martial glory or honour, and prefers instead to emphasise pragmatism, adaptability and completion of the mission over all other concerns. The Raptors, having been reduced to so few Battle-Brothers so often in their history, have no illusions about what war truly is. They understand that war is suffering and death. It is a brutal business that they specialise in, but they have no desire to wallow in its misery beyond what is required to carry out the Emperor's will.

Raven Guard
The Raven Guard is one of the original First Founding Space Marine Legions and was originally the XIX Space Marine Legion before the Second Founding and the adoption of the Codex Astartes. The Primarch of the Raven Guard was Corax, a name which is a play on the Latin binomial species name for raven, corvus corax. The Raven Guard's homeworld is the planet called Deliverance, the airless mining moon of the Forge World Kiavahr, though its original name, before the Horus Heresy, was Lycaeum. The Raven Guard's fortress-monastery on Deliverance is known as the Ravenspire. The Raven Guard are known for their cool-headed, even intellectual temperament, their superb infiltration skills and skill at furious close-quarters engagements. The Raven Guard are the masters of unseen and guerilla warfare, only engaging in frontal assaults when no other option presents itself. The Raven Guard is also rightly feared for the potent units of Assault Marines they field, who use a pair of Lightning Claws instead of the usual Bolt Pistol and Chainsword. Captain Kayvaan Shrike, the famed commander of the Raven Guard's 3rd Company, is the commanding officer of just such a unit.

Reclaimers
The Reclaimers are one of the Loyalist Space Marine Chapters Founded as part of the Astartes Praeses - one of the 20 Chapters of Astartes mentioned in the ancient tome known as the Mythos Angelica Mortis that was created to defend the regions surrounding the Eye of Terror in the Segmentum Obscurus from the Forces of Chaos. The Reclaimers are a Chapter of unknown Founding and origin. The level of technology and weaponry used by the Reclaimers Chapter appears to be higher than the Imperial average, even among the usually well-equipped Astartes, leading many outsiders to suspect that their Armoury is particularly extensive and diverse. Their Power Armour is noted to be highly decorative and finely-crafted.

Redeemed
The Redeemed are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Redeemers
The Redeemers are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Red Hunters
The Red Hunters have unusually strong ties to the Inquisition for a Space Marines Chapter; the entire Chapter has been known to serve under an Inquisitor Lord of any of the three main Ordos on occasion.

Red Scimitars
The Red Scimitars are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records except for the location of their homeworld within the Pandraxx Sub-Sector of the Acteron Sector of the Segmentum Ultima.

Red Scorpions
The Red Scorpions are the Chapter responsible for the creation of the Land Raider Helios artillery support vehicle. They are considered perhaps the most intensely Loyalist and puritanical of all the Space Marine Chapters and will not serve beside any xenos or mutants, including even Imperially-sanctioned Abhumans like Squats and Ogryns. However, they have a high-regard for psykers and make extensive use of Space Marine Librarians. They are well known in the Imperium as some of the best melee warriors in the galaxy.

Red Talons
The Red Talons are a Second Founding Successor Chapter of the Iron Hands.

Red Templars
The Red Templars is a Codex Astartes-compliant Chapter of unknown origin or founding date.

Red Wings
The Red Wings are a Loyalist Space Marine Successor Chapter of the Blood Angels, created during an unknown Founding. Almost nothing is known about this Chapter in Imperial records. Created as they were from the Blood Angels' gene-seed, they too, carry the genetic Flaws inherited from Sanguinius. Like many of their contemporary Successor Chapters founded in later centuries, the Red Wings were greatly affected by the genetic flaws of their Blood Angels' heritage known as the Black Rage and the Red Thirst.

Red Wolves
The Red Wolves are a Second Founding Chapter created from the gene-seed of the Iron Hands.

Relictors
The Relictors are a Renegade Space Marines Chapter Founded in the 36th Millennium, though of an unknown origin and Founding. When the Relictors were first established they were known as the Fire Claws. Founded to guard against the threat of the Traitor Legions attacking from the Eye of Terror, the Relictors were once counted amongst the most stalwart defenders of Mankind. But Chaos is insidious and a sinister secret now lurks at the heart of the Chapter, a secret that almost destroyed it and now threatens its very existence as well as the souls of its Battle-Brothers. The Relictors are believed by some to be a Successor Chapter of both the Ultramarines and the Dark Angels, as gene-seed from both Chapters was probably used in their Founding, though this remains unknown for certain. The Relictors were one of the 20 Chapters of the Astartes Praeses, created by the Imperium of Man after the Horus Heresy specifically to guard the threatened sectors of Imperial space surrounding the Eye of Terror.

Reparators
The Reparators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Retractors
The Retractors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Revilers
The Revilers are a Successor Chapter of the Raven Guard who specialize in jungle warfare.

Rhetors
The Rhetors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Salamanders
The Salamanders are a First Founding Space Marine Legion whose Primarch was Vulkan.

Sable Swords
The Sable Swords are a Loyalist, Codex Astartes-compliant Space Marine Chapter said to be founded in the latter years of the 41st Millennium, making them one of the newest Space Marines Chapters to be raised. Their origin and founding remain unknown, but their fortress-monastery is located on the world of Obsidia in the Ultima Segmentum.

Scythes of the Emperor
The Scythes of the Emperor are a Codex Astartes-compliant, Loyalist Chapter of Space Marines who are allegedly a Successor Chapter of the Ultramarines of the 25th Founding. The Scythes of the Emperor, along with their allies, the Lamenters Chapter, were virtually destroyed during the invasion of the Imperium of Man by the Tyranids' Hive Fleet Kraken.

Shadow Wolves
The Shadow Wolves were a Codex Astartes-compliant, Loyalist Space Marine Chapter derived from the Imperial Fists' gene-seed. Created during an unknown Founding, these Scions of Dorn were known to be a zealous and faithful Chapter by reputation, fighting for the honour of the Emperor of Mankind for thousands of Terran years, until they met their ultimate fate at the hands of a Tyranid splinter fleet in 987.M41 when their homeworld of Varadon was overrun by the xenos swarms.

Silver Eagles
The Silver Eagles are a Loyalist Codex Astartes-compliant Space Marine Chapter. They are a Second Founding Successor Chapter of the Ultramarines Legion. Little is known of this Chapter's history within the Imperial archives.

Silver Guard
The Silver Guard is a Loyalist Space Marine Chapter of unknown Founding and origin that fought to liberate the Sabbat Worlds Sector from the control of the Forces of Chaos during the Sabbat Worlds Crusade that began in 741.M41.

Silver Guards
The Silver Guards Chaper turned Renegade after the Obscuran Uprisings in the late 34th Millennium.

Silver Skulls
The Silver Skulls is an Ultramarines Successor Chapter founded during the 31st Millennium.

Silver Stars
The Silver Stars were once a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in current Imperial records except for the dire fate that they succumbed to. Unable to recover enough of the precious Progenoid Glands of their fallen Battle-Brothers, the Silver Stars could not cultivate further Astartes organ implants to create future generations of Space Marines for the Chapter. The Chapter quickly died off, unable to replace its losses. Like their counterparts, the Sons of Gorgax, this Chapter is now no more than a dusty memory, the only evidence of its existence being a dry footnote within the Index Astartes.

Skull Bearers
The Skull Bearers are a Loyalist Codex Astartes-compliant Space Marines Chapter of unknown origin and Founding.

Sky Sentinels
The Sky Sentinels are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. This Chapter hails from the world of Pranagar.

Sons of Antaeus
The Sons of Antaeus is a Space Marines Chapter created during the Cursed 21st Founding, records concerning the activities of the Sons of Antaeus are few.

Sons of Baal
The Sons of Baal are a Loyalist Space Marine Successor Chapter of the Blood Angels, created during an unknown Founding. Almost nothing is known about this Chapter in Imperial records. Created as they were from the Blood Angels' gene-seed, they too, carry the genetic Flaws inherited from Sanguinius. Like many of their contemporary Successor Chapters founded in later centuries, the Red Wings were greatly affected by the genetic flaws of their Blood Angels' heritage known as the Black Rage and the Red Thirst.

Sons of Dorn
The Sons of Dorn are a Loyalist Codex Astartes-compliant Space Marine Chapter and a Successor Chapter of the Imperial Fists. They were created during an unknown Founding at some time during the 34th Millennium. The Sons of Dorn's Chapter homeworld is the Feudal World of Archea which is located in the Segmentum Solar. In 999.M41 Archea was ravaged by a splinter fleet of the Tyranids' Hive Fleet Leviathan. With the bulk of their Chapter deployed in defence of the Imperium around the Eye of Terror to halt the 13th Black Crusade, much of Archea was consumed by the Great Devourer. With a world and a Chapter to rebuild, it will likely take several standard centuries before the Sons of Dorn are back to full strength.

Sons of Gorgax
The Sons of Gorgax were once a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in current Imperial records except for the dire fate that they succumbed to. Unable to recover the precious Progenoid Glands of their fallen Battle-Brothers in large enough amounts, the Sons of Gorgox were unable to cultivate further organ implants for future generations of new Space Marines for the Chapter. The Chapter quickly died off, unable to replace its losses. This Chapter is now no more than a dusty memory, the only evidence of its existence an ancient record within the Index Astartes.

Sons of Guilliman
The Sons of Guilliman is a Space Marine Chapter created during the 33rd Millennium from Ultramarines gene-seed.

Sons of Jaghatai
The Sons of Jaghatai are a Codex Astartes-compliant Loyalist Space Marine Chapter of unknown Founding. They are a Successor Chapter of the White Scars. Almost nothing is known about this Chapter in current Imperial records.

Sons of Justice
The Sons of Justice Space Marines are also known as "The Defenders of Varlite" because they fought along side the Storm Lords and the Black Ravens in an apocalyptic battle to defend the fortress of Varlite, an important air field and military camp built around and over the mountain ranges of the world of Valkador V.

Sons of Horus
The Sons of Horus was the name given to the Luna Wolves Legion after their Primarch Horus was named Warmaster by the Emperor, to carry on the Great Crusade in his name after he returned to Terra following the Ullanor Crusade in the 31st Millennium. Horus resisted using this name, which he found overly grandiose, until after his corruption by Chaos, when he found such monuments to his ego far more fitting. Today, at the end of the 41st Millennium, the Sons of Horus are the Chaos Space Marines collectively called the Black Legion and they are led by Horus' self-proclaimed successor and former First Captain of the Legion, Abaddon the Despoiler.

Sons of Malice
The Sons of Malice are a Renegade Chapter of Chaos Space Marines who turned Renegade some time prior to the start of the 13th Black Crusade in 999.M41. the Sons of Malice were originally Founded to watch over the sectors of Imperial space surrounding the Eye of Terror as one of the 20 Chapters of the Astartes Praeses. Events leading to the Chapter's excommunication began following the successful end of the Cilix 225 Campaign against heretics who had threatened to depressurize three underwater hive cities on that world, and ultimately led the Chapter to declare itself to be both enemies of the Imperium of Man and the Forces of Chaos even as it took up service with a Chaos God, the Renegade God Malal, also called Malice, the Hierarch of Anarchy and Terror. Perhaps the Chapter's most eerie quality is that the Sons of Malice reportedly fight in utter silence, and those who have fought against them cite this as the prime source of the deeply disturbing aura surrounding them.

Sons of Medusa
The Sons of Medusa are a Loyalist Successor Chapter of Space Marines drawn from the unforgiving Iron Hands Chapter whose existence was ratified by an Imperial edict of the High Lords of Terra in 011.M37. The Sons of Medusa are a Chapter with a history of ruthless efficiency in the merciless persecution of the Imperium of Man's foes. Like their forebears, they are extreme devotees of the Emperor of Mankind and look with disgust upon those who lack their strength of will. They are a distinguished Chapter whose long roll of battle honours can be traced back to the early 37th Millennium.

Sons of Orar
The Sons of Orar is a Codex Astartes-compliant Chapter of unknown origin, though the Chapter symbol is closely related to the Ultramarines' symbol. Though the history of the Sons of Orar has been lost, what is known is that they revere Orar, an Ultramarines Captain who won great renown in the wake of the Horus Heresy.

Sons of Vengeance
The Sons of Vengeance are a Renegade Chapter of Chaos Space Marines who turned to the service of the Ruinous Powers alongside the Silver Guards during the Obscuran Uprisings which ravaged the Segmentum Obscurus during the 34th Millennium.

Sons of Ulthunas
The Sons of Ulthunas Chapter turned Renegade against the Imperium of Man during the Ganymathian Betrayal. They are currently known as the Angels of Ecstacy and are Chaos Space Marines who serve Slaanesh, the Prince of Chaos.

Soul Drinkers
The Soul Drinkers are a Space Marines Chapter created during the Second Founding, who were drawn from the Imperial Fists Legion. The Soul Drinkers threw off the yoke of the Imperium which they beleived was corrupt and were declared Renegades by the Inquisition, but they are still loyal to the Emperor and their gene-seed was stabilised after numerous mutations.

Space Sharks
The Space Sharks are a Loyalist Chapter of Space Marines of the Second Founding whose origin remains unknown and who are the current guardians of the Endymion Cluster of worlds in the Maelstrom Zone of the Segmentum Ultima. The Endymion Cluster is the region once governed by the Mantis Warriors Chapter which the Space Sharks were granted following the Badab War as compensation for their losses. Before that conflict, the Space Sharks were a Fleet-based Chapter. It is not entirely clear whether the Space Sharks are a separate Chapter or are the same group of Astartes as the recently returned Carcharodons Chapter that also took part in the Badab War.

Space Wolves
The Space Wolves are one of the original 20 First Founding Space Marine Legions, and were once led by their famed Primarch, Leman Russ. The Space Wolves are renowned for their anti-authoritarian ways and their embrace of their homeworld Fenris' savage barbarian culture as well as their extreme deviation from the Codex Astartes in the Chapter's organisation. After the Horus Heresy and the resultant Second Founding reforms of the Adeptus Astartes, the Space Wolves Legion was divided into two Chapters: the new Space Wolves Chapter, which was not compliant with the dictates of the Codex Astartes and retained the name of its parent Legion, and the second Chapter which took the name of the Wolf Brothers. The Wolf Brothers suffered from rampant mutation of their gene-seed not long after their Founding and were later disbanded. It is currently unknown if there are any other Successor Chapters of the Space Wolves in the Imperium.

Star Dragons
The Star Dragons are a Loyalist Codex Astartes-compliant Space Marines Chapter of unknown Founding and origin. The Chapter homeworld of the Star Dragons is the planet Draconith.

Star Leopards
The Star Leopards are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Star Phantoms
The Star Phantoms  are a Loyalist Space Marine Chapter of unknown Founding and origin who participated in the Badab War. This Chapter was responsible for the final assault which ended the Badab War. Over five hundred Space Marines assaulted the Imperial Governors' palace on Badab, and during the assault, crippled the the Chapter Master of the Renegade Astral Claws, Huron Blackheart. The Cities of Death expansion book claims Captain Androcles of the Star Phantoms wounded him with a combi-melta in an ambush, although other sources claim that this was accomplished by an orbital bombardment.

Star Scorpions
The Star Scorpions were a Loyalist Space Marine Chapter of the 25th Founding of unknown origin. They are now considered extinct, a lost Chapter of Astartes. It is unknown what Chapter provided the gene-seed for the Star Scorpions' Founding and little else about the Chapter is available in Imperial records.

Steel Confessors
The Steel Confessors are a Loyalist Space Marine Chapter secretly Founded during the 36th Millennium's 19th Founding by the Adeptus Mechanicus for its own use from the gene-seed of the Iron Hands. After their discovery by the Inquisition, the Steel Confessors were forced to become an independent Chapter of the Adeptus Mechanicus, but they still maintain unusually close ties with the Mechanicum of Mars. They recently successfully defended their homeworld, the Forge World of Kalevala, from an attack by the Tyranid Hive Fleet Leviathan, though at great cost to the Chapter.

Stone Hearts
The Stone Hearts are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. Stone Hearts Battle-Brothers are known for marking their bodies with intricate tattoos that denote each battle that they have fought in.

Storm Callers
The Storm Callers is a Loyalist Space Marine Chapter of unknown origin and Founding. Nothing else is currently known about them in Imperial records other than that portions of the Chapter were corrupted by Chaos during the Storm Callers advance into the Taninim Expanse, a civil war was fought within the ranks of the Chapter and the Loyalists emerged triumphant, purging the Traitors from their midst.

Storm Falcons
The Storm Falcons are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Virtually nothing is known about this obscure Chapter within the official Imperial archives, except the name of the Chapter' homeworld of Talon located in the Segmentum Ultima in the Hodur Sector. In 997.M41, Hive Fleet Leviathan encroached into Imperial space. The Tyranids, under the direction of the legendary synapse creature known as the Swarmlord, orchestrated multiple planetary invasions. In the span of only four months, the Swarmlord oversaw the absorption of 24 worlds, including the Storm Falcons' Chapter homeworld of Talon. This resulted in a series of swift victories for the Leviathan along the spine of worlds within the Hodur Sector. Talon was subsequently abandoned. Whether or not the Storm Falcons fought to the last or simply abandoned their doomed planet is not known. The Chapter's current fate remains unknown.

Storm Giants
The Storm Giants are a Loyalist Codex Astartes-compliant Chapter of Space Marines created during the 26th Founding in 738.M41. Their origins remain unknown, though many suspect that they are a Successor Chapter of the Salamanders of Nocturne. The Storm Giants are primarily a Fleet-based Chapter, preferring to meet any threats to the Imperium of Mankind on their own terms. They also do not want to be tied down to any one world, having to defend a fortress-monastery in case they are ever attacked, as has happened to to many other Space Marine Chapters. As a Fleet-based Chapter, the Storm Giants can stay mobile while avoiding those that would bring ill fortune upon their Chapter.

Storm Lords
The Storm Lords are a Loyalist Space Marines Chapter and a very rare Second Founding Successor Chapter created from the gene-seed of the White Scars.

Storm Hawks
The Storm Hawks are a Loyalist Codex Astartes-compliant Space Marine Chapter and a rare Successor Chapter of the Raven Guard. Their exact founding date is unknown but the Storm Hawks are thought to be related to the Raven Guard through a later Founding.

Storm Warriors
The Storm Warriors are a Loyalist Codex Astartes-compliant Space Marines Chapter of unknown origin and Founding. It appears that they are a late Founding Chapter. However, beyond this, almost nothing is known about the Storm Warriors in Imperial records.

Storm Wardens
The Storm Wardens are a Codex Astartes-compliant Space Marine Chapter of unknown founding and origin based on the Forbidden World of Sacris in the Calixis Sector of the Segmentum Obscurus. Their entire 1st Company and Chapter Master Owin Glandwyr were placed into stasis within a sealed portion of the Chapter's fortress-monastery on Sacris following the Nemesis Incident of 945.M36. Furthermore, the Chapter homeworld of Sacris was forbidden to have any contact with the rest of the Imperium by the Inquisition. The reason for these steps remain unknown.

Storm Wings
The Storm Wings are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. The Storm Wings Chapter homeworld is the Eyrie, a planet in the Segmentum Solar. Nothing else is known about them in Imperial records.

Subjugators
The Subjugators are a Loyalist Space Marine Chapter suspected to be a Successor Chapter of the Imperial Fists' created during either the 23rd or 24th Founding in the 41st Millennium. The Subjugators are one of the 20 Chapters of the Astartes Praeses who were specifically created to guard the sectors of the Imperium that lie near the Eye of Terror. The Chapter's homeworld is called Xenax, which lies in the Segmentum Solar.

Supplicators
The Supplicators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Swords of the Emperor
The Swords of the Emperor are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown Founding or origin. Little is known of this Chapter's history within the Imperial archives.

Tarantulas
The Tarantulas are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Taurans
The Taurans are a Loyalist Chapter of Codex Astartes-compliant Space Marines of unknown Founding and origin. Nothing else is known about the Chapter in Imperial records.

Tainted, The
The Tainted are a large warband of Chaos Space Marines drawn from the Death Guard Traitor Legion who are dedicated to the Plague Lord Nurgle in his aspects as the God of Despair and the Mortifier of the Flesh. The Tainted supplement their numbers on the battlefield with a large number of disease-ridden Chaos Spawn called "Plague Spawn," mutated Plague Ogryns and other horribly mutated beasts who are collectively known as the "Rotted Circus". The most powerful of these beasts was a massive Chaos Spawn riddled with Grandfather Nurgle's plagues who was named "Jibberjaw". The Tainted were one of the 11 Chaos Space Marine warbands to participate in the Siege of Vraks, seeking to aid the Forces of Chaos in the defence of the Imperial Armoury World of Vraks that they had seized from the Emperor under the leadership of the Apostate Cardinal Xaphan.

Tempestors
The Tempestors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Templars of Blood
The Templars of Blood are a Chapter of Loyalist Space Marines and Successors to the Blood Angels of an unknown Founding. Like their progenitor Chapter, these sons of the Primarch Sanguinius take pride in their ability to meet the foe head-on, although this is where the similarities between the Chapters end. The Astartes of the Templars of Blood are known to suffer from the Flaw of Sanguinius known as the Black Rage at a much reduced rate compared to the Blood Angels or their other Successor Chapters. This reason for this is unknown, though some suspect the Chapter has bought this boon through dark and secretive means.

Terror Tigers
The Terror Tigers played a small part in the Inquisition War trilogy novel Harlequin. They lost one quarter of their Chapter when a mutant warlord assaulted their homeworld, after which their Chapter Master ordered his own execution as punishment. An exploration team of Terror Tigers rediscovered the lost feral world of Hannibal, intervening in an Eldar attempt to reclaim the world as their own. The team dramatically came to the primitive human natives' rescue.

Thousand Sons
The Thousand Sons are a Traitor Legion of Chaos Space Marines wholly dedicated to the service of the Chaos God Tzeentch who were once one of the First Founding Space Marine Legions before the Horus Heresy. The Legion's Primarch was Magnus the Red, an unusual Primarch who possessed potent psychic powers and a deep knowledge of sorcery. Magnus the Red is presently a Daemon Prince of Tzeentch. The Thousand Sons also had an unusually high number of psykers in their midst, a number which only increased after they swore themselves to the service of the Changer of Ways, who is the Chaos God of Sorcery. Due to the workings of a potent sorcerous spell called the Rubric of Ahriman, none of the Thousand Sons Chaos Marines possess organic bodies any longer; instead, their souls have been directly fused with their suits of ancient Power Armour. The Thousand Sons may also have included a small contingent of Space Marines who remained loyal to the Emperor during the Heresy, refused to flee into the Eye of Terror and split off to form their own Loyalist Chapter. The descendants of these Space Marines may be the current Blood Ravens Chapter, which like the Thousand Sons possesses an unusual number of psykers among its Battle-Brothers.

Thunder Barons
The Thunder Barons are a Renegade Chapter of Chaos Space Marines of unknown origin. Formerly a Loyalist Chapter of Astartes, they eventually spat on their oaths to the Emperor of Mankind and instead swore their allegiance to the Chaos Gods, and to the Blood God Khorne in particular. Since their fall to Chaos, the Thunder Barons have become obsessed with looking for amulets and artefacts of arcane power that will enhance their abilities in combat -- and provide more victims for the Blood God's pleasure.

Tiger Claws
The Tiger Claws Chapter was the original name for the Traitor Marines who now call themselves the Astral Claws. They were depicted as wearing black and orange tiger-striped Power Armour with a tiger head as their symbol. Imperial records were later amended to indicate that the Tiger Claws were in fact a separate Loyalist Chapter of Space Marines who were later believed destroyed in the Warp by the Imperium. However, a large portion of their Astartes survived and were illegally absorbed into the Astral Claws Chapter. They are now rightfully considered a part of that Renegade group of Astartes (see Red Corsairs).

Tigers Argent
The Tigers Argent are a Loyalist Chapter of Codex Astartes-compliant Space Marines of unknown Founding and origin. They aided the Imperial Angevin Crusade that conquered the Calixis Sector of the Segmentum Obscurus for the Imperium of Man in the early 39th Millennium. There is little else currently known to be recorded about them in Imperial records other than that their homeworld is known as Icefang.

Tormentors
The Tormentors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Tributors
The Tributors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Ultramarines
The Ultramarines, the direct descendants of the XIII Space Marine Legion of the First Founding, are considered the greatest of all the Space Marine Chapters in the Imperium of Man, almost single-handedly holding the Imperium together after the Horus Heresy. They are currently led by their famed Chapter Master, Marneus Augustus Calgar, the Lord Macragge. Their homeworld is Macragge in the autonomous Imperial Realm of Ultramar. The Ultramarines have more Successor Chapters descended from their gene-seed than any other First Founding Legion.

Valedictors
TThe Valedictors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records. The Valedictors were originally a First Founding Legion which saw action on the Eastern Fringe of the Imperium against Orks, Eldar, and Traitors during the Horus Heresy. They were described in detail in two Epic articles in White Dwarf  126 and 136, circa 1990-91. The status of the Valedictors changed in White Dwarf 235, where they are said to be of a "later Founding," (post-Second Founding). Therefore, the Valedictors are no longer a First Founding Legion.

Venerators
The Venerators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. The Venerators, along with the Warhawks, were completely wiped out during the Black Crusade led by Doombreed, the mightiest Daemon Prince of the Blood God Khorne.

Venerators of Osiron
The Venerators of Osiron are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Victors
The Victors are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Vindicators
The Vindicators are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Viper Legion
The Viper Legion is a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records except that they are based in the Aurelius System.

Violators
The Violators are a warband of Chaos Space Marines that are dedicated to the Chaos God Slaanesh, the Prince of Pleasure. The mutated bodies of these Chaos Space Marines are treated as personal temples to the Prince of Chaos, whom it is said looks very favourably upon these corrupted Astartes. Because of this, warriors of the Violators almost never willingly remove their Power Armour, for they consider it to be sacrilegious. A Violators warrior will only do so in the presence of those whom they truly believe are worthy -- those who fully embody Slaanesh's ideals of pleasure and perfection. They have also been known to reveal themselves before a worthy adversary before combat commences. Often their bodies are surgically altered so that their physical sensations are heightened unimaginably by changes made to their neural architecture. The Violators have also been known to use electrical pulses produced by implanted electrodes to stimulate the parts of the brain that produce pleasure.

Vorpal Swords
The Vorpal Swords are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records other than their participation in the Gheistos Cataclysm.

War Bearers
The War Bearers are a Loyalist Chapter of Codex Astartes-compliant Space Marines of unknown Founding and origin. Nothing else is known about them in Imperial records.

War Hawks
The Warhawks were a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. The Warhawks, along with their brother Chapter, the Venerators, were completely wiped out during Chaos Black Crusade led by Doombreed, the mightiest Daemon Prince of the Blood God Khorne.

Warrior Adepts
The Warrior Adepts are a Loyalist Chapter of Codex Astartes-compliant Space Marines of unknown origins and Founding. Nothing else is known about them in Imperial records.

Warriors Tempest
The Warriors Tempest are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in the Imperial records.

Warmongers
The Warmongers are a Loyalist Codex Astartes-compliant Space Marine Chapter of unknown origin and Founding. Little else is recorded about them in Imperial records.

Warp Ghosts
The Warp Ghosts is a Chapter of unknown founding and origin, who turned Renegade.

White Consuls
The White Consuls are a Second Founding Chapter of Space Marines. They are listed in the Apocrypha of Davio as having derived from the Ultramarines' gene-seed.

White Minotaurs
The White Minotaurs are a Codex Astartes-compliant Chapter of unknown origin and founding date.

White Panthers
The White Panthers were part of the 26th Founding. They are organized according to the Codex Astartes.

White Scars
The White Scars were one of the First Founding Legions of Space Marines. They are known and feared throughout the Imperium for their highly mobile way of war.

White Templars
The White Templars are a Codex Astartes-compliant Chapter, rumoured to be descended from the Black Templars.

Widowmakers
The Widowmakers are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records.

Wolf Brothers
The Wolf Brothers were a Second Founding Successor Chapter of the Space Wolves. They were later eradicated by the Inquisition due to rampant mutation of the unstable Space Wolf gene-seed.

Yellow Jackets
The Yellow Jackets are a Loyalist Second Founding Chapter of Space Marines of unknown origin.