The newest addition to the Star Wars saga, "Star Wars: The Revenge of the Sith" sees the turning of Anakin to the Dark Side, as well as the introduction of the Clone Troopers. 

"At the time of their introduction, the Republic clone trooper represented the future of galactic warfare. Far superior to the battle droid armies of the era, the clone troopers formed the backbone of the Republic's new military initiative that battled against the forces of the Confederacy of Independent Systems. So pervasive and symbolic were they of the times, the galaxy-wide conflagration that saw their debut took its name from their ranks: the Clone Wars.

The original source of genetic material was an extremely skilled bounty hunter named Jango Fett. Using his genetic code as a template, the Kaminoans carefully tampered with the material to produce clones with diminished independence and accelerated growth.

Palpatine (later the Emperor), who was in truth Darth Sidious, had masterminded the Clone Wars from its very inception, having arranged the creation of the army through the dead-end front of Sifo-Dyas. As part of a contingency, there were a series of emergency protocols that each clone commander was specifically trained to enact.

Order 66 identified the Jedi order as traitors to the Republic that had to be eliminated with all haste and with extreme prejudice. With his shadowy plot fully in motion, Sidious used his wide-spanning communications network to make contact with his loyal clone commanders, and executed Order 66. The clones turned on their Jedi leaders. They opened fire on the unsuspecting Jedi Knights, bringing to an end Clone War.  With their Jedi leaders taken out, the chain of command placed the clone troopers under the Chancellor, who would regroup and reform his galaxy-spanning armed forces into the stormtrooper ranks that came to symbolize the oppressive might of the Galactic Empire. "

View the Trailer for "Star Wars: The Revenge of the Sith" here: