A Separatist stronghold existed in Tarko-se, a location on the planet of Cato Neimoidia. This base included a repurposed arena, which provided shelter for the Confederacy military. During the Battle of Cato Neimoidia, Clone Flight Squad Seven and the 442nd Siege Battalion engaged the Confederacy of Independent Systems forces, led by General Baik Raaorn; the 442nd laid siege to the base, which acted as the Separatist's command center.