In the grim darkness of the 41st millennium, Mankind is assailed on all fronts by perfidious aliens, degenerate traitors and treacherous rebels. To fight them is the destiny of the Space Marines of the Black Templars, fearless champions and unforgiving crusaders against the enemies of the Emperor. Forged from the Imperial Fists Space Marines in the aftermath of the Horus Heresy, the Black Templars have undertaken the longest crusade the Imperium has ever known to prove their loyalty.

"The Emperor's realm must be cleansed of the taint of the xenos and the heretic. We destroy the former by the sword, we shall destroy the latter through faith and the sword."

- Dreadnought Gerlach to the warriors of the Donorian Crusade