It was during the second half of the clone wars, war had raged on Mustafar system, Clone Senior Commander Cam lead his battalion, the 513th Sky Legion and they wore purple armor. Assisting them was Jedi High General Obi-Wan Kenobi who lead the 212th Attack Battalion under Clone Marshal Commander Cody. The 513th took the right way while 212th took the left and after firing and blaster firing as Clone Trooper Red who was very out going trooper as he always for some strange reason knew something was going to happen before it did. He was good friends with Clone Trooper Firehead. As the battle increased the 513 suffered many losses. They were able to reach the command post where they met up with the 212th Attack Battalion as Kenobi assigned ARC Trooper Crys to go with Boil and 10 other 212th clones.
While in battle Red was like deflecting shots like he knew what was going to happen than Firehead was injured and than as a B2 about to kill him.