For everyone that likes Warhammer 40k Tabletop and Dawn of War Games or anything to do with Warhammer 40K.
In 433.M40, the Autarch of the planet Krieg in Segmentum Tempestus declared himself independent from the Imperium and renounced the Emperor as his divine master. Krieg was then locked in civil war. Much of Krieg quickly fell to the rebels except for Hive Ferrograd which came under the command of the now infamous Colonel Jurten of the Krieg 83rd Imperial Guard. Under strict orders to not let Krieg fall but with the promise that no fleet on the scale that was needed to invade a planet was available Jurten decided that Krieg would either belong to the Emperor or to no one. On the day of the feast of the Emperors Ascension Jurten unleashed a counter attack of atomic cleansing that was to turn into a great purging. For days Krieg was engulfed in a sea of nuclear fire. Krieg's ecosystem collapsed and the planet was engulfed in a nuclear winter. But the civil war dragged on. The survivors from Jurten's purging were forced to exist in underground bunkers or deep in the radioactive chem-wastes, as their descendants do to this day. From the self-annihilation of their home world, loyalist troops slowly retook their world inch by inch over 500 years. From this the Death Korps were born. Krieg was finally returned to the Imperial rule in 949.M40