The Kashyyyk Oil Refinery was an oil refinery located on the Wookiee homeworld of Kashyyyk. In the waning days of the Clone Wars, forces of the Confederacy of Independent Systems attempted to destroy the facility. The 501st Legion, aided by Wookiee resistance fighters, held them off until the arrival of Jedi Master Yoda. With the help of the diminutive Jedi Master, the clone troopers were able to push the Confederate forces back.