The Grievous' Fist was the CIS and CUS primary flagship. It was under the command of Bisoge Sargos for its entire service in the CIS and CUS. After Sargos was declared Supreme Chancellor of the CIS, the Grievous' Fist was refitted with newer weaponry and given advanced fighters. The Grievous' Fist was eventually retired eight years after the CUS assumed rule over the galaxy and crushed the major rebellions, including the Republic Restoration Movement and the Alliance to Restore the Empire.\