Astartes Praeses

The Imperial Aquila

The Astartes Praeses are a group of twenty Loyalist Space Marine Chapters whose sole purpose is to guard the Eye of Terror in the Segmentum Obscurus. The ancient tome known as the Mythos Angelica Mortis makes a single reference to 20 Space Marine Chapters created from the unique gene-seed of those Primarchs who did not fall to Chaos during the Horus Heresy and who were charged with protecting the Imperial sectors surrounding the Eye of Terror and supporting Cadia and the Inquisition as needed. Although the brotherhood of Space Marines included in the Astartes Praeses originally included 20 Chapters, one has been destroyed by the Forces of Chaos and two other Chapters, the Relictors and the Sons of Malice, were both declared Excommunicate Traitoris by the High Lords of Terra. Though it should be noted, the latter Chapter is only suspected of being one of the original 20 Chapters mentioned in the Mythos Angelica Mortis. The truth of this matter may never be known for certain. The Astartes Praeses were evidently Founded anew rather than assembled from the remnants of the Space Marine Legions, like many of the other Second Founding Chapters, to reduce the possibility of corruption by Veteran Space Marines who had been exposed to Chaos during the fighting of the Horus Heresy.

Compiler's Note: This is a partial list of the Imperial military strength forming the containment force around the Ocularis Terribus. Communications difficulties and the secrecy of some Adeptus Astartes Chapters means that this should be considered little more than conjecture. Though no comprehensive list has ever been assembled, the current known and past members of the Astartes Praeses include:

Chapter	Progenitor Chapter	Founding	Millennium
Angels Eradicant (Status Unknown)	Unknown	Unknown	Unknown
Black Consuls(Active)	Ultramarines	Second Founding	31st Millennium
Brothers Penitent(Status Unknown)	Unknown	Unknown	Unknown
Crimson Scythes(Status Unknown)	Unknown	Unknown	Unknown
Excoriators(Status Unknown)	Imperial Fists	Second Founding	31st Millennium
Iron Talons(Status Unknown)	White Scars	Unknown	Unknown
Knights Unyielding(Status Unknown)	Unknown	Unknown	Unknown
Marines Exemplar(Status Unknown)	Unknown	Unknown	Unknown
Night Watch(Status Unknown)	Unknown	Unknown	Unknown
Reclaimers(Status Unknown)	Unknown	Unknown	Unknown
Relictors (declared Excommunicate Traitoris)	Unknown (Presumed to be the Ultramarines and the Dark Angels)	Unknown	Unknown
Sons of Malice (declared Excommunicate Traitoris)	Unknown	Unknown	Unknown
Subjugators(Status Unknown)	Imperial Fists	23rd Founding or 24th Founding	41st Millennium
Viper Legion(Status Unknown)	Unknown	Unknown	Unknown
White Consuls(Status Unknown)	Ultramarines	Second Founding	31st Millennium

Sources

• Codex: Eye of Terror (3rd Edition)
• Dark Creed (Novel) by Anthony Reynolds, pg. 45
• Legion of the Damned (Novel) by Rob Sanders, pp. 14, 21, 60, 74
• Architect of Fate (Anthology) by Sarah Cawkwell, Ben Counter, Darius Hinks, and John French