The Sienar Corporation is the name of the umbrella corporation that operates Sienar Fleet Systems (as well as many other divisions). Sienar is responsible for technology such as the TIE Fighter and the Immobilizer 418 Interdictor Cruiser. The location of the Sienar Corporation is currently in the Lianna System. The corporation known as Sienar has a long history of its products being used in important galactic conflicts, going back at least as far as five millennia before the Battle of Yavin, where Sienar built warships for Empress Teta during the Unification Wars.