Known Great Crusade Chapters of the Ultramarines

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By the late Great Crusade, the Ultramarines Legion was organised into 25 Chapters,[1a][1k] each organised into multiple Battalions and Companies, and made up of roughly 10,000 Space Marines.[1j][2]

Known chapters

By the time of the Calth Muster, the Ultramarines included:

Notes

  • Note 1: "unmarked": The Ultramarines who served in the Battle of Calth received, both physically as well as psychologically, the Mark of Calth. They were changed, and from then, differed from their brothers who had not been present. The latter were thus called the "unmarked", and were never again able to fully fit in with the rest of the Legion that had endured the horrors of Calth. Even Roboute Guilliman appeared uncomfortable in their presence, as they reminded him of what his legion had lost at Calth. In the Great Scouring, the "unmarked" chapters were increasingly deployed away from the remaining legion, and they were among the first to be split off and organised into independent Space Marine Chapters during the Second Founding.[1g]
  • Note 2: "Evocatii": indicates that the Chapter had a large proportion of raw recruits, supported by a core of veterans. Used by Roboute Guilliman as training units for Neophytes.[1j]
  • Note 3: Some Companies are not clearly tied to a Chapter by number. For example, the "547th Company" is noted as being on Calth and surviving, but the number of the company doesn't line up with an existing Chapter.[4]
  • Note 4: In the 41st Millennium, the Black Consuls claim that their first Chapter Master Arrias Cordos was part of the "72nd Chapter" during the Horus Heresy. No Heresy-era reference to the 72nd Chapter exists, and its possible that they were originally the "72nd Company" before time corrupted the remembering.[5]

Sources