The TIE Advance X1 Prototype was a starfighter used by the Dark Lord of the Sith Darth Vader during the reign of the Galactic Empire. Darth Vader's TIE Advanced x1 starfighter was a prototype of the TIE line Advanced series manufactured by Sienar Fleet Systems. It was used by Darth Vader during the reign of the Galactic Empire in many battles throughout the Lothal insurgency, and the Galactic Civil War.