Luke was born during the chaos as the galaxy transitioned from Republic to the tyrannical Empire. He and his twin sister, Leia, were secretly spirited away from his father and the Emperor. Luke was taken to live with Owen and Beru while his sister was taken to Alderaan to be raised by Viceroy Bail Organa.

On his uncle's moisture farm, Luke learned the essentials of desert survival and droid repair. Boredom was not as scarce as water on Tatooine, and Luke often dreamed of adventure and excitement. He had a circle of friends who would loiter around Tosche station in Anchorhead when not occupied by their chores. Luke never quite fit in with his friends; they often teased him and called him "Wormie." Biggs Darklighter, though, was different and Luke considered him a true friend.

Luke honed his piloting skills alongside Biggs in Tatooine's infamous Beggar's Canyon, racing his T-16 skyhopper. Biggs and Luke often spoke of joining the Imperial Academy. Despite his dreams, Luke was not allowed to attend. His uncle needed him on the farm, and so when Biggs went away to the Academy, Luke was stranded on Tatooine.

Imperial forces in pursuit of the droids murdered Owen and Beru Lars and destroyed Luke's home. With nothing left on Tatooine, Luke decided to follow Kenobi. The wise man taught Luke in the ways of the Jedi Knights and the Force, ways for which Luke showed an affinity. Kenobi gave Luke Anakin's lightsaber.

Luke and Kenobi hired the smuggling duo of Han Solo and Chewbacca for transit off planet. They were destined for Alderaan, to return the Rebel droids to their owner, Princess Leia Organa. They discovered Alderaan destroyed by the Imperial superweapon, the Death Star, and were taken captive aboard the monstrous station. There, Luke discovered that Leia was also held captive.

Luke helped free the Princess from the clutches of the Empire. Using data stolen by Rebel spies, Alliance tacticians formulated an attack plan capable of destroying the battle station. Luke piloted an X-wing starfighter in the final attack against the Death Star, and fired the proton torpedo volley that, with the aid of the Force, destroyed the Imperial weapon.

Luke eventually accepted a commission in the Alliance military, and achieved the rank of commander. On the new Rebel base on Hoth, Luke served as a scout on the frozen plains of the ice planet. While on patrol, Luke was injured by a wampa ice creature, and dragged to its lair. Using his growing expertise in the Force, Luke escaped. Han Solo eventually rescued Luke from the frozen wilderness.