Few conflicts shame the Imperium as deeply as The Badab War, a savage and prolonged civil conflict fought among the Space Marines themselves across the opening decades of the 41st Millennium. What began as a bitter dispute over tithes and autonomy slowly metastasised into open secession and a full decade of brother slaughtering brother.
At the heart of the storm stood Lufgt Huron, Chapter Master of the Astral Claws and self-styled Tyrant of Badab, who withheld the Imperium's rightful due and openly defied the edicts of the Adeptus Terra. When every attempt at negotiation failed, loyalist Chapters were despatched to compel obedience by force, and the isolated worlds of the Maelstrom Zone became a sprawling battleground of siege, boarding action and starship duel that dragged proud and ancient brotherhoods into fratricidal ruin.
The war was fought without clear or lasting lines, Chapters shifting allegiance under pressure, whole worlds changing hands, and the cherished ideals of the Adeptus Astartes steadily eroded by suspicion, atrocity and reprisal. Slowly and at great cost the loyalist forces ground the secessionists down, storming the fortified world of Badab itself and breaking the Tyrant's power in bitter close-quarters fighting through its shattered bastions. Warriors who had once fought side by side now traded fire without mercy, each side utterly certain of its own righteousness.
Huron was believed slain in the flames of his collapsing fortress, but he clawed his way from the wreckage rebuilt into something monstrous — Huron Blackheart, master of the renegade Red Corsairs and a scourge of the Imperium ever after. Thus a war meant to punish one Chapter's pride instead birthed one of the galaxy's most feared reavers. The full history is told in the chronicle of the Badab War.