Imperium of Mankind

History
On the Planet of a Terra a penultimate psychic being known as the God Emperor of Mankind created biological warriors known as Thunder warriors. They were tools to be used to unite the techno-barbarians of Terra and being the unification process for all of humankind. Upon the Unification of Terra the genetic experiment undertaken under take in the Himalayan Mountains came to fruition. Twenty legions of Space Marines aka Astartes, were raised up under the banner of the Imperium of Mankind. These genetically altered humans had progenitors. They were known as the Primarchs, and before their incubation process was complete they were stolen by the Gods of the Immatierum or Chaos Gods. The Emperor then started the Great Crusade to locate his Primarchs and to take back the the stars of the previously fallen human race. Stopping first at Mars, the technological hub of the Golden Age of Humanity, and upon reaching Mars he ran into the Machine Cult, or more formally he was in a negotiation with the Parliament of Mars. Due to the psychic nature of the Emperor, and quite frankly his fast knowledge of technology, he was deemed the Omnissiah, or Machine God. Essentially becoming the quite literal living God of the cult. With great note, the Emperor hates religion and actually seeks to destroy all of it, but allowed this worship as apart of the Treaty of Mars or more officially The Treaty of Olympus Mons. The treaty essentially allowed the Tech Priests to continue their faith and worship of machines and spirits, while also granting complete political autonomy. It also barred them from the Imperial Truth.

The Emperor then set his sights on the entire Milky Way Galaxy. His began a campaign of bouncing from planet to planet, as a Godly being, ordering them to either fall in line with the Imperial Truth or perish. All Xenos races were purged as he believed that their could be no co-existence between them. Recovering his Primarchs took many years, their advanced ageing making each of them adults by the time the Emperor had found them all. As each Primarch was found,