The Age of the Imperium

The Age of the Imperium spanned the ten millennia between the Heresy's end and the twilight of the forty-first millennium, a vast and grinding epoch in which mankind's realm calcified into the brutal theocracy that endures to this day. The Imperial Truth was forgotten, and in its place rose the Imperial Cult, worshipping the broken Emperor upon His Golden Throne as the one true god of humanity.

Across these long centuries the Imperium fought without pause, beset on every side by xenos empires, daemonic incursions, and the endless treachery within its own ranks. The Ecclesiarchy held the faith of a hundred billion souls, and its militant orders, the Adepta Sororitas, waged holy war upon heretic and alien alike with fire and faith and unwavering zeal.

Cataclysms came and went in numbers beyond reckoning. The War of the Beast nearly saw the Imperium overrun by greenskin hordes; the Age of Apostasy tore it apart from within as a mad High Lord seized power; wars against the Aeldari, the Necrons, and encroaching new threats bled the human realm without cease.

Slowly, inexorably, the Imperium declined. Knowledge decayed into ritual, innovation became heresy, and each generation understood less of the machines and lore it had inherited. By the close of the forty-first millennium the Imperium was a vast and rotting edifice, held together by faith and terror, its people toiling in ignorance beneath the gaze of a god who could no longer speak.