The Maraqoo sector, a sector situated in the Wild Space area close to the Unknown Regions, was quite isolated. Within this sector, the single inhabited star system was known as the Reo system.
During the period of the Battle of Yavin, the Maraqoo sector existed as a freestanding subsector under the control of the Galactic Empire. This implies that, before the Imperial period, this distant location had not been adequately explored or recorded, only gaining recognition from the Empire as a possible sector. Despite this, upon its inclusion into Imperial Space, the region did not receive official sector designation, and consequently, it lacked representation in the Imperial Senate for the time being.
During the time of the Lost Tribe of Sith emergence, some Jedi made a visit to the Celestial Palace, the home of the Thuruht hive of the Killiks located in the Reo system.