In the darkness of the forty-first millennium, mankind is assailed on all fronts by perfidious aliens, degenerate traitors and treacherous rebels. There is no escape from the horror and slaughter, the only alternative is to meet the threats and defeat them. This is the destiny of the Space Marines of the Adeptus Astartes, fearless champions of humanity and unforgiving crusaders against the enemies of the Emperor of Mankind.
"They shall be pure of heart and strong of body, untainted by doubtr and unsulliedf by self-aggrandizement. They will be bring stars in the firmament of battle. Angels of Death whose shining wings bring swift annihilation to the enemeies of Man. So shall it be for a thousand times a thousand ytears, unto the very end of eternity and the extincti8on of mortal flesh:
Roboute Guilliman - Primarch of the Ultramarines