Sy Myrthian Insurrection 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 . Prelude . The galactic conflict known as the Clone Wars ended during 19 BBY , with the Galactic Republic vanquishing the Confederacy of Independent Systems . However , some Confederates continued to fight on as the Separatist holdouts at the beginning of the Imperial Period , including one of the Confederacy ' s founders , Sy Myrthian ex - Senator Toonbuck Toora . Toora managed to reactivate Separatist ground and naval forces , as well as restart production in Confederate factory world s in the vicinity of her homeworld of Sy Myrth , a stretch of space around the Perlemian Trade Route known as the " Foundry of the Confederacy " . Uprisings like Toora ' s forced the Galactic Empire , the successor of the Republic , to begin a large campaign known as the Reconquest of the Rim . The Imperials relocated the Twelfth Army to the world of Charros IV in response to Toora ' s uprising . The insurrection . After several months of fighting during 19 BBY , in which they reduced Toora ' s forces in an attritional campaign , the 12th Sector Army under the command of Admiral Adar Tallon and General Jan Dodonna emerged victorious at the world of Diado . It subsequently won another victory at Metalorn . Following those victories , the Imperials besieged Sy Myrth itself under Dodonna ' s expert guidance , eventually defeating the forces there . Tallon and Dodanna then chased down Toora ' s flagship , " Defiance ' s Banner " , with a task force led by the " Praetor " - class Star Battlecruiser " Battalion " . The end of the campaign came in the Trasemene system , after the Imperial task force cornered Toora ' s fleet there . In the ensuing battle , the " Battalion " ripped apart Toora ' s fleet with its turbolaser batteries , killing Toora and ending the insurrection . Aftermath . Though the Sy Myrthian Insurrection had ended , some Confederate followers continued to harass the Empire from the Kreetan Narrows region in Hutt Space , close to Sy Myrth . As a result of the activities in the Kreetan Narrows , the Empire later annexed the Hutts ' northern territories , which included the Narrows and the worlds of Vaathkree , Kessel , and Honoghr . Dodonna later received honors for his role in the pursuit and elimination of Toora , while his and Tallon ' s exploits were celebrated on the Core Worlds of the galaxy . Both men later became disillusioned with the Empire , however , after it became increasingly brutal and oppressive in its conduct , and after the Declaration of Rebellion in 2 BBY , Dodonna and Tallon would defect to the newly - formed Alliance to Restore the Republic . Behind the scenes . The insurrection was first mentioned in " The Essential Guide to Warfare " , an extensive dedicated to the conflicts in the galaxy , written by Jason Fry and Paul R . Urquhart , and released in 2012 .