Atsah Cultural Region
These worlds were originally member systems of the Atsak Federation, a disintegrating Vargr state in the early years of exploration by the Third Imperium. The Atsak Federation had disintegrated by the time the Atsah Subsector was incorporated into the Imperium (IY 200) - but the members of the Atsah Cultural Region (other than Atsah itself) are all, technically, independent worlds outside the Imperium. Not that you would know as you pass through because they have very close associations with the Imperial Navy and the Starport Authority.
Worlds & Sectors (Astrography)
This polity is primarily located in the following areas:
World Listing: 1105