From Lexicanum

The Black Crusade of Doombreed was a Black Crusade in which the overall losses were relatively low compared to other Black Crusades. The attack was led by a Daemon Prince named Doombreed and in this crusade he officially declared war on the Adeptus Astartes, finally completing the Chaos Space Marine's betrayal. It is known however, that the Warhawks and Venerators chapters were destroyed in the fighting.

Sources

• Liber Chaotica: Khorne