CT-550 was an ARC trooper private later, a private in the 501st legion and after the Clone Wars was promoted to a commander. CT-550 was like kloon skyler but remained in service with the Republic and later served in the Galactic Empire. CT-550 used to serve ARC trooper commander Fordo then, when he joined the 501st served Anakin Skywalker then in the Galactic Empire served Darth Vader. After the Galactic Civil War, CT-550 joined the Mandalorian Protectors, led by Boba Fett.