Assault On Black Reach. In the grim darkness of the 41st millennium, the Imperium of Man wages a ceaseless war for its very survival. Among its greatest defenders stand the Space Marines, genetically enhanced superhuman warriors engineered to be the pinnacle of martial prowess. None exemplify this ideal more than the proud and disciplined Ultramarines. When the distant world of Black Reach comes under siege by a massive ork invasion, the Ultramarines respond with unmatched speed and ferocity. Should the greenskin horde establish a foothold, it could spell disaster for the entire sector. Now, with one hundred Ultramarines standing against fifty thousand brutal orks, an epic battle looms on the horizon, as the fate of Black Reach and its surrounding systems hang in the balance.