Assault on Mount Tantiss The Assault on Mount Tantiss , also known as the battle of Mount Tantis , was carried out by agents of the New Republic to shut down Grand Admiral Thrawn ' s cloning facility at Mount Tantiss on the planet Wayland . Prelude . During the Thrawn campaign , former Emperor ' s Hand Mara Jade was arrested by the New Republic for a possible implication in an Imperial raid on Coruscant . She later revealed to Luke Skywalker that she knew the location of Thrawn ' s cloning facility . Skywalker accepted to liberate her in exchange for the coordinates of Wayland . Meanwhile Imperial Colonel Selid had discovered that Joruus C ' baoth had killed General Covell in manipulating his mind . Selid reported to Grand Admiral Thrawn who ordered to to put C ' baoth under arrest and confinement in the Emperor ' s throne room . But the Dark Jedi had the time to send Covell ' s forces kill the ysalamir i placed by Thrawn near Mount Tantiss to control C ' baoth . On Coruscant , Leia Organa Solo met the smuggler Talon Karrde . He revealed her that the Empire took a large amount of ysalamiri on Myrkr and that could be a trap for Skywalker . They decided to go to Wayland together to warn their friends . The Mission . In the forest . Jedi Knight Luke Skywalker , along with Mara Jade , Han Solo , Chewbacca and Lando Calrissian landed on Wayland and trekked through the forests of Wayland to Mount Tantiss . They first met a group of Noghri Death Commando s came to Wayland to help the son of Darth Vader . They later met some inhabitants of the planets , the Myneyrsh i and the Psadan s , and convinced them to stay neutral . Some Myneyrshi eventually decided to help them in fighting the Empire . Destroy Mount Tantiss . They eventually entered the Mount Tantiss facility when they fought stormtroopers . Calrissian and Chewbacca went off to find a way to destroy the facility while Skywalker and Jade went to look for the facility ' s remote destruct control . In the cloning chambers , Calrissian was eventually able to rig an arhythmic resonance scheme to destroy Mount Tantiss . Meanwhile Skywalker ' s sister , Leia Organa Solo , entered the facility with Talon Karrde . Duel in the throne room . Skywalker and Jade entered the throne room and confronted the mad Jedi clone Joruus C ' baoth . C ' baoth killed the Force - dampening ysalamir i and revealed Luuke Skywalker , a clone of Skywalker . Skywalker and the clone faced off as C ' baoth incapacitated Jade with a blast of Force lightning . Eventually Leia Organa Solo , Han Solo , and Talon Karrde entered the throne room . C ' baoth unleashed a Force scream , stunning everyone in the room . Taking advantage of the Jedi Master ' s distraction , Jade managed to Force pull Organa Solo ' s lightsaber , and slew Skywalker ' s clone , carrying out the Emperor ' s last command . Enraged for the death of Skywalker ' s clone , the Jedi Master began to bring the ceiling down on Jade and Skywalker . However , Jade used Organa Solo ' s lightsaber to cut holes in the floor so that the rocks fell through and moved against C ' baoth . Guided mentally by Organa Solo , she reached the insane Jedi , and cut him down with the lightsaber . He exploded in a blast of dark side energy . Aftermath . The destruction of the Mount Tantiss facility halted the Imperial cloning operation once and for all . With the death of Thrawn at the Battle of Bilbringi , the events of the day were disastrous for the Empire and ended the Thrawn campaign . Skywalker ' s duel with his clone went on to traumatize him for the days following . After the destruction of Mount Tantiss , Wayland became a planet of particular interest to the New Republic . Researchers and Intelligence officers scoured the planet and ruins for clues to aid in their defeat of Imperial warlords , discovering evidence that would lead to the political fallout of Bothan involvement in the destruction of Caamas . The New Republic also relocated the Noghri to the colony of New Nystao on Wayland to escape their collapsing home world of Honoghr .