Black Crusade

In the grimdark past of earth there was only death hate suffering and war. Humanity tries to keep destroying its foes the heretics, the death painters, the slavers, and the knights of Tertium. The reason they haven't been overrun is because of their crusades every 20 years a crusade is launched that lasts for 20 years the last crusade was the red crusade this crusade is the last prophesied one before the end times. The black Crusade