Following the Lost Tribe of Sith emergence in 43 ABY, Luuuke Skywalker took the place of Luke Skywalker, superseding Luuke Skywalker. Luuuke then embarked on a mission to unite all of the clones that were created by Grand Admiral Thrawn into a single, unified fighting force. This Clone Army was intended to be used by Luuuke to seize control of the galaxy. To accomplish this, Luuuke collaborated with Streeen in the construction of a time machine, which they subsequently employed to move the Clone Army to the era of the Clone Wars, where they engaged the Galactic Republic's own Clone Army in combat.