Clone Trooper CT-7567 was an important ARC Clone Trooper fighting side by side with Anakin Skywalker and Ahsoka Tano. At the time of the Clone Wars, he was promoted to commander of the 32nd Legion, where he remained for the rest of the war. He showed great intelligence, strategy, and leadership in his battles. When "Order 66" was called by the evil Emperor Palpatine, the inhibitor chip in Rex's brain forced him to see all Jedi as enemies. However, as this transformation happened right in front of Ahsoka, she was able to figure out what happened and find out about the inhibitor chips forcing the clone troopers to hate the Jedi. After Ahsoka captured Rex she got the inhibitor chip out of his brain and Rex turned back to his normal personality. The next challenge; to get his "brothers" back on their side. In the end, Rex and a few of his brothers Wolffe and Gregor retired and hid to never have to fight again.