Suluk was a group of modified Beta-class ETR-3 Escort Transports based at the Imperial research station Obsidian as part of the TIE Experimental Project. The Rebel Alliance's first recorded encounter with Suluk came when a pair of A-wings detected a distress call from Calico in a nearby convoy while escorting a staff transfer through the Belat system. Responding to the distress call, the A-wings found the convoy to be under attack from TIE Bizarros, and the escort transports of Suluk lurking at the fringes of the combat zone.