The Ebon Knights were a Loyalist Space Marine Chapter of unknown origin and Founding. Virtually nothing is known about this reclusive Chapter other than that they participated in the notable campaign upon the industrial world of Iriad IV, where they fought a brutal action against a warband of the World Eaters Traitor Legion. The battle against these Khornate Berserkers resulted in the mutual destruction of both forces and the corruption of the Ebon Knights' sole survivor by the Blood God Khorne.