Darth Kaos, born Gerad Herks on Lehon in 21 BBY during the Clone Wars, was the secret apprentice of Darth Sidious. Kaos' father was a Jedi Knight and fought during the Clone Wars. In 14 BBY Lehon was discovered by Darth Sidious in his quest to find Rakatan technology and rebuild the Star Forge. Sidious took Herks to be his new apprentice and assassin. Herks' name was changed to Darth Kaos once his training was complete and his new life began in earnest.