Operation Shieldfall was a Sith mission to the planet Nam Chorios in 44 ABY that resulted in a battle between the forces of the New Jedi Order, the Lost Tribe of Sith, and the dark side entity Abeloth. After their tenuous alliance to destroy Abeloth was broken, both the Jedi and Sith pursued Abeloth—who had caused a psychosis amongst the Jedi. Sith apprentice Vestara Khai, along with Jedi Grand Master Luke Skywalker and his son, Ben, tracked Abeloth to Nam Chorios, where they met the Force-sensitive Theran Listeners and discovered that the Therans had fallen under Abeloth's control. Khai sent a message to her father, Gavar, who led a Sith flotilla to the planet. After searching for Abeloth in various locations and being attacked twice by Sith under the command of Saber Tola Annax, Vestara