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During the 7th Black Crusade in 811.M37, the entire Blood Angels Chapter fell upon Mackan to do battle with a vast Black Legion warband led by Abaddon the Despoiler himself. Though they had their full strength behind them, the aftermath of the battle saw the Blood Angels nearly destroyed at the hands of Abaddon and his primary lieutenants Telemachon Lyras and Iskandar Khayon. Rampagers Chapter came to reinforce the Blood Angels but did not succeed. After the Black Legion departed from Mackan, the Blood Angels' corpses were found desecrated and their Gene-seed ruined beyond recovery. The only exception being the Reclusiarch Thalastian Jorus and his Death Company, who had managed to survive the initial slaughter of their Chapter and launched a surprise attack on Abaddon and his honour guard weeks later. Jorus and the Death Company managed to kill many of the honour guard before being struck down and Abaddon would leave their corpses untouched, sitting upon thrones made from the armour of the Chaos Space Marines they had killed.
- 1: Index Astartes: Death Company, pg. 10
- 2: Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes, pg. 18