In 20 BBY, Sharpshooter squad was temporarily fragmented after a mission to Geonosis, where most of the original group was killed in an explosion. After the mission ended, several of the recruited squad challenged Rex's leadership, and requested that Blastmaster take control of the squad. Blastmaster refused immediately, and the squad, who no longer felt Rex was a good leader, (with the exception of Blastmaster) fragmented.