Clone Force 99 was a group of clone commandos the titular characters of the arc, the Bad Batch featured in the seventh season of Star Wars: The Clone Wars and will be the titular protagonists of The Bad Batch. They were different from the other Clone Troopers due to mutations, calling the normal Clones as "regs" (short for "regular")/ They reported to no one, but had contact with Commander Cody, second-in-command of Obi-Wan Kenobi.
The Force were named after the clone, 99, who gave his life during the Battle of Kamino.