The Kol Huro system, a factory system, was under the oppressive dominion of Mustag Olus, a tyrannical ruler. Olus, swayed by the Dark Lord of the Sith, specifically Darth Sidious, dedicated each of the system's seven planets entirely to the creation and production of starships and armaments, notably the Kol Huro combat droid. In 44 BBY, the Jedi Order, acting on behalf of the Galactic Republic, brought about the tyrant's defeat.
During the invasion of the galaxy, the Yuuzhan Vong seized control of the system.