ARC-66322, nicknamed Jac, was a Beta Arc Sergeant during the Clone Wars, the galaxy-wide conflict between the Galactic Republic and the Confederacy of Independent Systems. Jac was part of the famous Beta Squad and later part of Torrent Company, a unit of 501st Legion. He fought under the command of Captain Rex. During Order 66, Jac and his Brother In Arms, T-Fives, left the Empire and saved about 43 Jedi Knights and Padawans. After that, Jac became a bounty hunter and joined Clan Skirata.