Purkoll, a city situated on the planet of Skako Minor, functioned as the central base of operations for the Techno Union. D1-series aerial battle droids and octuptarra magna tri-droids were used as guards at the facility. In the time of the Clone Wars, ARC trooper Echo underwent experimentation at this location, but he was saved during a Galactic Republic mission to the planet, headed by Jedi General Anakin Skywalker, Sergeant Hunter, and Clone Captain Rex, which resulted in damage to the facility.