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A map of the Imperium of Man after 999.M41 displaying the Great Rift. The Imperium Sanctus lies to the south and west of the Great Rift; note the Nachmund Gauntlet in the galactic west near the Eye of Terror.

The Imperium Sanctus is the High Gothic name given in the Era Indomitus to the southern and western half of the Imperium of Man where the psychic beacon of the Astronomican is still visible to Navigators and psykers alike after the formation of the Great Rift.

The Imperium Sanctus consists of the Segmentums Pacificus, Tempestus and Solar, and portions of both the Segmentum Obscurus and Segmentum Ultima.

The name is a hollow one, for even beyond the influence of the Great Rift, the dire edge of the times can be felt. Daemons and Traitor armadas have struck at Holy Terra itself during the Battle of Lion's Gate, and the expansive reach of the Warp Storms throughout the galaxy enable the forces of Chaos to strike without warning from nearly any quarter.

The other half of Imperial space is known as the Imperium Nihilus, or the "Dark Imperium." There the light of the Astronomican has never recovered from the darkness of the Noctis Aeterna.

Warp travel and FTL communications are still disturbed within the Imperium Sanctus by the birth of the rift and the lingering effects of the Noctis Aeterna. But the Astronomican's continued transmission means that the worlds of the Imperium Sanctus are not as isolated from each other or as vulnerable to Chaos and xenos threats as those of the Dark Imperium.

The tithes continue to flow from most worlds, but although efforts have been redoubled to produce machines of war and to call forth regiments of troops, they are barely sufficient to the needs of the Imperium’s current state. Shrinking the Imperium’s size by half has not made it easier to supply, but instead has doubled the dangers to every world.

The two halves of Imperial space are now separated by the roiling Warp Storms that comprise the Cicatrix Maledictum, connected only by the passage through the rift known as the Nachmund Gauntlet. The gauntlet is book-ended by two worlds at either end, Sangua Terra on the side of the Imperium Sanctus and Vigilus on the Dark Imperium side.

Because of Vigilus' strategic position as one terminus of the only passage through the Great Rift, it became the source of conflict between Imperial, Chaos and xenos forces during the War of Beasts in the early years of the Era Indomitus.

The worlds of the Imperium Sanctus are among the most stable of those remaining to the Imperium in the Era Indomitus, including Terra, Mars, Fenris and the planets of Ultramar.

However, the Imperium Sanctus certainly suffers from its fair share of conflicts and threats, as no place in the galaxy is now entirely free from strife as the power of Chaos waxes ever stronger.

The loss of resources from the worlds of the Dark Imperium have made every defeat suffered by the Imperium a greater one, but such is the strength of the Imperium Sanctus that the forces of Chaos are made to pay in equal measure.

The Imperium Sanctus is directly governed from Holy Terra by the Senatorum Imperialis and Lord Commander of the Imperium and Imperial Regent Roboute Guilliman.

Videos

Sources

  • Imperium Nihilus: Vigilus Defiant (8th Edition), pp. 5, 11, "To Run the Gauntlet"
  • Warhammer 40,000: Core Book (9th Edition), pg. 20
  • Warhammer 40,000: Rulebook (8th Edition), pp. 50-53, 123, 134, 152, 164-166
  • White Dwarf 35 (July 2019), "Indomitus Crusade Fleets," pp. 40-45
  • Wrath & Glory: Core Rules (RPG) (2018 Edition), pg. 41
Raven Rock Videos
Warhammer 40,000 Overview Grim Dark Lore Teaser TrailerPart 1: ExodusPart 2: The Golden AgePart 3: Old NightPart 4: Rise of the EmperorPart 5: UnityPart 6: Lords of MarsPart 7: The Machine GodPart 8: ImperiumPart 9: The Fall of the AeldariPart 10: Gods and DaemonsPart 11: Great Crusade BeginsPart 12: The Son of StrifePart 13: Lost and FoundPart 14: A Thousand SonsPart 15: Bearer of the WordPart 16: The Perfect CityPart 17: Triumph at UllanorPart 18: Return to TerraPart 19: Council of NikaeaPart 20: Serpent in the GardenPart 21: Horus FallingPart 22: TraitorsPart 23: Folly of MagnusPart 24: Dark GambitsPart 25: HeresyPart 26: Flight of the EisensteinPart 27: MassacrePart 28: Requiem for a DreamPart 29: The SiegePart 30: Imperium InvictusPart 31: The Age of RebirthPart 32: The Rise of AbaddonPart 33: Saints and BeastsPart 34: InterregnumPart 35: Age of ApostasyPart 36: The Great DevourerPart 37: The Time of EndingPart 38: The 13th Black CrusadePart 39: ResurrectionPart 40: Indomitus
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