The Sy Myrthian Insurrection was fought in 19 BBY, during the Imperial Reconquest of the Rim, when the Galactic Empire attempted to drive out the holdout forces of the Confederacy of Independent Systems led by Sy Myrthian ex-Senator Toonbuck Toora from the region around the planet Sy Myrth. The Confederacy had been defeated by the Galactic Republic, the Empire's predecessor, previously that year at the end of the Clone Wars. During the campaign, the Imperial Twelfth Army, under the command of Admiral Adar Tallon and General Jan Dodonna, won battles at Diado and Metalorn, and besieged Sy Myrth itself, before defeating the Separatist holdout forces under Toora in the Trasemene system, a battle in which Toora herself was killed, ending the insurrection.