TX-20 was a T-series tactical droid who served the Confederacy of Independent Systems during the Clone Wars. He was assigned to the command of Wat Tambor, foreman of the Techno Union and Emir of Ryloth. During the Battle of Ryloth, TX-20 and his forces conquered the Twi'lek city of Nabat, establishing a base camp in the city's courtyard and capturing the city's population. TX-20 was tasked with preventing the Republic from pushing their assault to free Ryloth, using the captured Twi'leks of Nabat as a living shield to prevent the Republic from launching reprisal strikes against droid forces.