The Twin Ion Engine (TIE) fighter is a series of fictional starfighters featured in the Star Wars universe. TIE fighters are depicted as fast, agile, yet fragile starfighters produced by Sienar Fleet Systems for the Galactic Empire and by Sienar-Jaemus Fleet Systems for the First Order and the Sith Eternal. TIE fighters and other TIE craft appear in Star Wars films, television shows, and throughout the Star Wars expanded universe.