Darth Vich's insurrection

During the Great Galactic War, the young Sith Lord Darth Vich used his personal army of Rattataki warriors in an attempt to seize authority in the Sith Empire. The insurrection ultimately failed, allegedly due to the defection of several of Vich's Rattataki Sith Acolytes. The surviving Rattataki who had stood with Darth Vich were either killed or enslaved by the Empire's ruling Dark Council.