The ARC trooper captain was a specialized Clone trooper assigned with leading squads of ARC troopers from Star Wars. They were the most skilled and feared branch of the Army of the Republic. They were even fewer in the limited ranks of ARC troopers. Their armour was similar to their subordinates and the only difference was the red colouring on their facemasks and upper armour. Since most ARC trooper squads were small and often consisted of 10 members, the ARC trooper captains often focused on infiltration, sabotage and surprise attacks. During the Battle of Muunilinst, an ARC trooper squad was responsible for bringing down the defences of Muunilinst and bringing San Hill, the leader of the Intergalactic Banking Clan to justice.