Touler served the Galactic Empire in the Imperial Navy during the Galactic Civil War. The fleet commander was present during the Assault on Kamino, an attempt by the Rebel Alliance to take out the cloning facilities of the planet Kamino, in 1 BBY. When Rebel starships entered the Kamino system, the Sith Lord Darth Vader told a signals officer to inform Touler that it was time to commence the battle. The Empire had its fleet positioned above Kamino, but the Rebellion broke through its defenses and was victorious.