Cloned and raised in the cities of Kamino, the clone troopers, trained for combat since birth. All clone troopers received basic training in core military skills, such as weapons handling, marksmanship, and other essentials. They came to be regarded as one of the most efficient military forces ever to have ever existed. This was not only due to their training, but also to their unwavering loyalty to the Galactic Republic.
After the fall of the Republic, and the execution of Order 66 the Clone Troopers were re-organized and became Stormtroopers.