Battle of Duro ( Clone Wars ) The Battle of Duro was one of the many battles of Operation Durge ' s Lance , a Separatist campaign to spearhead into the Core , during the Clone Wars . It proved to be a major Confederate victory . The battle . At 0221 local time , Operation Durge ' s Lance had broken through the outer system defenses of Duro , destroying four Golan Arms battle platforms , and three " Acclamator " - class ships — " Anvil " , " Coronet " , and " Bolide " . Also destroyed were two " Dreadnaught " - class heavy cruisers " — " Prominence " , and " Atrisian Iron " . After the initial attack , only four more Acclamators , a " Victory " - class Star Destroyer , and another " Dreadnaught " remained . One of Duro ' s largest space cities , Jyvus Space City , had surrendered to the Confederate Navy . Divisions of battle droids transformed the floating city into a field command station for the Office of the General . At the same time Duro Chief Representative Officer Hoolidan Keggle had gone missing . Intelligence speculated that Keggle fled the city down to the planet below . The First and Third Fleets of the Confederate Navy , the original task force launched from Yag ' Dhul , had been provisioned by supply lines from Sullust and Thyferra . Techno Union ships had launched seismic EMP countermines to clear the way for an easy attack . To counter the Confederate fleet , the Galactic Republic sent a squadron of Jedi starfighters and two wings of V - 19 " Torrent " starfighters . But Vulture droids and droid tri - fighters easily broke through the Republic counterattack , managing to destroy another three assault ships . The Confederate forces were then positioned to cut off all Republic reinforcements from Kuat or Nubia . After capturing Jyvus Space City , the Confederacy was able to drop the planetary shields protecting Duro . Separatist drop fighter s and capital ships began orbital bombardment of planetside industrial factories . The bombardment let the troops land and during a week of hard fighting , city after city began to fall to the Confederacy until Hoolidan Keggle signed General Grievous ' s capitulation to the Separatists . The battle lasted less than a week . Aftermath . Following the battle , the Senate Bureau of Intelligence investigated causes of the defeat . A month later , in a report issues by Agent Inglemenn Barezz , it was revealed that the three " Venator " - class Star Destroyers that were to have been assigned to protect Duro had been reassigned to " shakedown cruises " by the Senate Action Subcommittee for Corellian Trade Spine Defense . It was also revealed that , in reality , the Committee ' s chairman , Iseno Senator Ronet Coorr , had reassigned the ships to Rodia after being bribed with contracts for rebuilding on Ando by the Rodian senator , Onaconda Farr . After the release of the report , both Coorr and Farr resigned from the Senate . A public backlash against both the Senate and Rodians in general was provoked , with calls for giving the Supreme Chancellor full power to conduct the war and for giving Humans command of fleets stationed around rival planets . A full investigation of Senate Action Subcommittee s was launched with the goal of restructuring them . The Battle of Duro was one of General Grievous ' most impressive military victories , and caused many within the Republic to view him as a greater threat than Count Dooku . Duro would be liberated by the Republic later in the same year . Along with victories at Commenor , and Balmorra , the battle was instrumental driving the Confederacy from its bases in the Core Worlds and the Colonies regions of the galaxy and beginning the Outer Rim Sieges ,