The structure designated Vault S-86 by the Galactic Republic was a Rakata vault constructed by the Infinite Empire in what would later be known as the High Security Section on the planet Belsavis. During the Cold War with the Sith Empire, Republic scientists under Doctor Gantrell stored weapons developed during their research into the prison's power core in Vault S-86, and a group of Gamorrean prisoners attempted to steal the weapons before they were stopped by the Jedi Knight known as the Hero of Tython.