About halfway through the Clone Wars, the Republic launched an assault to conquer the dark world of Umbara. There were several strikes teams including Obi-Wan Kenobi's 212th Attack Battalion, Saesee Tiin's 182nd Star Battalion, Anakin Skywalker's 501st Legion and Rexx Vortex's Vortex Legion. The Vortex Legion gunship that Rexx was on was shot down by Umbaran MHCs and crashed onto an Umbaran highway.