Tarrak was a Human admiral in the Imperial Navy during the Galactic Civil War. In 3 ABY, he was placed in command of a task force charged with destroying a fleet of Alliance to Restore the Republic transports in the Sprizen sector of the Outer Rim Territories. However, in the middle of the campaign, he contacted a Rebel Alliance Intelligence agent, offering to defect with his Star Destroyer, the Red Claw, for a price. He also informed them of the Imperial plan to attack the last Rebel transports in the Asher system.