The junker systems was a group of star systems. The barren Expansion Region planet Jarbanov and its moon were located on the outskirts of the junker systems, in the inner section of one of the systems. Around 5 ABY, the Galactic Empire's 204th Imperial Fighter Wing traveled to Jarbanov, where the fighter wing's Squadron Four attacked the Jarbanov colony while the Imperial Quasar Fire-class cruiser carrier Aerie was collecting the wreckage of nine TIE/ln space superiority starfighters from Jarbanov's orbital junk rings. The mission concluded with Squadron Four rendezvousing aboard the cruiser-carrier Allegiance behind Jarbanov's moon. The Allegiance jumped into hyperspace, and the Aerie also escaped the system thereafter.