The Siege of Lasan saw the near-extinction of the Lasat species under the military forces of the Galactic Empire. During the early years of the Empire, the Imperial Military brutally suppressed an uprising on the Lasat homeworld of Lasan. The conflict led to the near-extinction of the Lasat people and caused the Imperial Senate to ban T-7 ion disruptor rifles. Some Lasat survived, like Garazeb Orrelios, who later joined the rebellion, while others like Gron and Chava resettled on the mystical Lasat refuge of Lira San.