Clone Trooper Commanders, also called Clone Commanders, were Clone Troopers bred on Kamino for leadership roles in the Grand Army of the Republic. They fought in the galaxy-wide conflict known as the Clone Wars.
They led regiments of 2,304 Clone Troopers which were organized into 16 separate companies. Each legion of Clone Troopers only had one senior clone commander. Sometimes, however, smaller regiments and battalions were led by clone commanders, like Commander Cody, who led the 212th Attack Battalion. When Jedi needed a group of Clone Troopers, no matter what size, a Clone Commander would usually join the group to assist the Jedi Generals.