When the Imperium moved into the Reavers' Deep in the 200's, they absorbed most of the worlds into the Imperium. The worlds of Orkney (Reavers' Deep 2919) and it's colony Maiden (Reavers' Deep 2920) were too xenophobic for contact and were never completely absorbed into the Imperium. Since that time, they have been quarantined by the IISS and are being observed from the scout base on Khagish (Reavers' Deep 3019)