The Calixis Sector is an Imperial sector in Segmentum Obscurus near the Halo Stars and the Eye of Terror. Conquered by Lord Militant Angevin a thousand years ago, the Calixis Sector contains many heavily populated and important worlds, though it lies a great distance from the Imperium’s heartland. Its first governor was Drusus, one of Angevin’s most capable generals, a man now revered as an Imperial Saint. It is the setting for the Dark Heresy Role-playing Game.
The Koronus Expanse in the 41st Millennium is a scattered, partly-explored region containing a few young colonies and vast natural wealth still barely exploited. Rogue Traders vie with one another for known resources, heedless of lives lost in the pursuit of riches, while a tentative attempt at Imperial colonization follows in their wake. Drawn by the flow of wealth, pirates and servants of the Dark Gods have also slipped into the Expanse, eager to wreak destruction upon the works of the God-Emperor’s faithful, living by what they wrest from dead hands, while the Expanse itself holds many secrets and native inhabitants no less dangerous. Beyond these human conflicts lie truly dark and dangerous voids, rife with rumored terrors, undiscovered stars, and worlds of man that have never known the God-Emperor. There are no defined warp-routes, no safe ways through the swirling empyrean. These regions hold the fearsome Ork, the treacherous Eldar, and strange ruins that lie beneath the light of dying stars.