Supply depot I-389 was an Imperial supply depot located on Tatooine. Moff Sartar had a laboratory in the depot, where he supervised the development of Fire-Rain 3, a deadly bio-agent. Sartar had planned to test his new weapon on the inhabitants of nearby Anchorhead and Mos Eisley, but was foiled when a team of Rebel Alliance agents managed to destroy all samples of the bio-agent, along with Sartar's lab.