Forces of the Imperium

Spanning a million worlds, with a populace running into countless billions, the lmperium has been the bastion of humanity for over 10,000 years. Four hundred centuries have passed since mankind took its first few tentative steps into the stars and now much of the galaxy is under the sway of the immortal Emperor. Enemies constantly assail the Emperor's domain — Tyranids, Eldar, Orks and the ever-present threat of Chaos.

The lmperium must fight eternal battles against these menaces and also crush all rebellions, insurgencies, secessions and heresies from within its own ranks. These tasks fall to the vast armies and fleets of the Emperor, organisations so large and so widely scattered that even the Administratum of Earth are not able to tally the men and machines fighting in the thousands of crusades and warzones.

The armies which fight humanity's wars are drawn from three main fighting arms of the lmperium — the massive war engines of the Titan Legions, the regiments of the Imperial Guard and the elite Space Marine Chapters of the Adeptus Astartes. These three elements are sometimes used alone but more often they are forged together into a combined force which is as deadly a weapon as any commander could hope for.