The turret droid was a Trade Federation war machine used to defend strategic locations. Like the later Octuptarra combat tri-droid, the turret droid was arranged as a weapon pod atop three stilt legs. It is unclear whether these legs were used for locomotion, or merely for bracing the turret once deployed. Turret droids were used extensively by the Trade Federation during the Invasion of Naboo, guarding Federation holdings beyond the system as well as defending prison camps on Naboo itself.