Vice Admiral Tallatz held a position as an officer within the Imperial Navy of the Galactic Empire throughout the Imperial Era. Tallatz's responsibilities included serving as a naval chief and participating as a member of the Joint Chiefs of the Imperial Military. On a certain day, he, along with three other naval chiefs, received a summons from the Galactic Emperor Palpatine to convene with him in the Denon system. The meeting was set to take place aboard the Defiance, a starship functioning as a mobile flight academy under the leadership of Commandant Pell Baylo.