The Tactical Droid Guild was a society brought together by General Grievous. It consisted of eight T-series tactical droids. Each was distinguished with a different color and name. The guild created a new shield generator core which would allow any projector to produce a shield that would diminish all organic matter that came into contact with it. Only a few members, TDA and TDD, perished in the Third Battle of Geonosis. The rest were captured by Ahsoka Tano and Barriss Offee.