Calixis Sector

The Calixis Sector is a frontier region of the Segmentum Obscurus comprising more than two hundred Imperial worlds, with Scintilla as its hive-capital. It was formerly known as the Calyx Expanse and borders the Koronus Expanse. The sector lies near the Halo Stars and the Eye, and Inquisitors of the Dark Heresy period treated it as their principal area of operations.

Angevin’s crusade organised what had been unsettled space into a sector. Authority within it remains contested: Golgenna, the Drusus Marches, Malfi, Hazeroth and the Periphery dispute which hive exercises actual control, while Iocanthos and Sepheris Secundus bear the cost of the remainder. Cults, xenos and the Spinward Front have all been active within its bounds. The sector is a concern of the 41st millennium’s administration and is not associated with the Great Crusade.

The Calixis Sector remains the Imperium’s most thoroughly documented troubled frontier. Unofficial fan maps keep the Segmentum Obscurus as its parent and do not merge Calixis into Scarus or the Koronus Expanse.