Alpha-81 was an ARC trooper of the Galactic Republic, and later, the Rebellion. There was not anything known of his service to the Republic, except of his great help on Kashyyyk. He later joined the 2nd Clone Rebellion on Kamino and became one of the leaders of the Triumph. He found SARC/12164 on Coruscant, and fought him until 64 joined the rebellion, SARC Squad with him.