The Anti-Sith Conspiracy was a secret plot arranged by Grand Moff Trachta and Atha Prime around 15 BBY. The plan was to kill both Emperor Palpatine and Darth Vader, ridding the Empire of its rule by the Sith. However, Emperor Palpatine was aware of the conspiracy the whole time, and when attempts were made on both his and his apprentice's lives the conspirators were rounded up and executed. The only conspirator to survive was Prime, who was exiled to the Dark Worlds Holding Facility instead.