Teska was a Human male serving the Sith Empire as a general early on during the Cold War. He was an experienced front-line commander, having fought throughout the entire Great Galactic War. Being old by the end of the conflict, but not necessarily a worse officer, he was stationed aboard a new experimental vessel—the Devastator, the first of a new class of warships. It was under the command of Grand Admiral Marino Sevir, someone who he enjoyed talking to. There, he commanded the army troops stationed aboard. Teska was given the fairly simple assignment due to his age. However, a Jedi Knight infiltrated the ship, and managed tosabotage it, destroying the Devastator. Everyone aboard was killed, including Teska.