Sepulchor Sector is a sector of Imperial space located to the galactic west of the galactic core. Since the opening of the Great Rift in the Era Indomitus the Kin of the Greater Thurian League have dispatched numerous Prospects west beyond the circumnuclear disc that marks the boundary of the galactic core. They have deployed forces into the neighbouring Marsalis and Sepulchor Sectors in numbers not seen outside the galactic core since the Kin first settled there.
The remit of these forces is to claim new worlds for those Thurian Kindreds dispossessed by the Chaos invaders pouring from Warp Storm Örgvayr near Thurian space in the core, and identify safe star systems for the league to fall back to should its defences fail or the fight become too costly. Imperial planetary governors throughout both sectors have responded to this apparent invasion with a predictable mix of panic and zealotry, hurling armies at the encroaching Kin even as their astropaths' fragmentary distress calls wing their way out to the wider Imperium.
Sources[]
- Codex: Leagues of Votann (9th Edition), pg. 28