The Adeptus Astartes and the agents of the Officio Assassinorum have never seen eye to eye, despite the fact that their ultimate goal is essentially the same. Because of the longstanding warrior traditions and codes of honour by which the Space Marines operate, the vast majority of Chapters see the Assassin's trade as distasteful at best. Though the Officio's operatives have fought alongside the Space Marines on countless battlefields across the Imperium, there are several incidences in the history of the Adeptus Astartes where Assassins have been implicated as enemies rather than allies. The Officio Assassinorum is suspected in the involvement of the Chapter's demise. A strangely empty set of early-model Power Armour was discovered near the site of the ambush at Alantor X, where the Angels of Retribution fell to a man.
The Angels of Retributon primarily wore grey Power Armour with black shoulder pauldrons. The trim of the shoulder pauldrons was also grey. The torso, groin and helm were red. The Aquila or Imperialis on the chest was black. The white squad specialty symbol -- (Tactical, Assault, Devastator or Veteran) -- was indicated on the right shoulder plate. A black Roman numeral centred in the middle of the squad specialty symbol indicated company number. The iconography on the left poleyn (knee guard) indicated squad number in accordance with the Codex Astartes.
The Angels of Retribution's Chapter badge was a white, winged sword, alight with the red flames of retribution on a field of black.
- Adeptus Astartes: Successor Chapters (Limited Release Booklet), pg. 9
- Chapter Approved 2001 - Second Book of the Astronomican, pg. 117
- Dataslate: Officio Assassinorum, pg. 14