CT-1971, also known as Parts Theta, was a male clone trooper in the Clone Wars who later formed Clan Theta. During the Clone Wars, he was assigned to Theta Squad. He earned the nickname "Parts" due to the fact that he repaired his armor with the armor of his fallen comrades. Towards the end of the war, he and his squad were assigned to Concord Dawn. When Order 66 was executed, Arwen Xalrich and CT-8492 attacked the rest of the squad, killing one member and injuring another. The battle traumatized Parts and he soon retired after the battle. He eventually found others who detested war like him and formed Clan Theta.