Sector four was an area of jungle on the planet Wayland. It was located past the perimeter of Tantiss Base, an Imperial facility built in Mount Tantiss on Wayland. Around 18 BBY, Shuttle 135 crash landed in sector four during a storm and its crew were killed by the creatures of the jungle. The rogue clones Crosshair and Omega later traveled to sector four after escaping Mount Tantiss, encountering a dryax there as well as Imperial forces.