Clone trooper film series and in the "Star Wars" expanded universe media, a number of specialized trooper units are seen, including elite special forces units such as the 'Advanced Reconnaissance Commandos' (ARC troopers), and Null ARCs, who usually work alone. All clone commandos and ARCs were trained by Mandalorian mercenaries; the elite Clone Troopers are known as Shadow Troopers. The style and color of a clone troopers armor often varies depending on their rank, specialization, unit, or environment, for example, the clone troopers on Kashyyyk wear camouflage green scout-style armour whereas the 501st legion wears standard white armor with blue accents. Another
Clone trooper Tano. He first appears in "The Clone Wars" film and its related television series, and he is the primary clone trooper character of the series. Rex later appears in the "Rebels" television series, set fourteen years after "Revenge of the Sith". Now a much older man because of his accelerated aging, he lives on the wasteland planet Seelos and hunted worm-like joopa with Wolffe and Gregor before they are offered a place in the Rebel Alliance. ARC trooper Fives, CT-27-5555, serves alongside fellow ARC trooper Echo. He first appears in "The Clone Wars" season one episode "Rookies" as a regular