Biggs Darklighter grew up on Tatooine with Luke Skywalker, and shared his friend's dreams of escaping the dull desert world. After graduating from the Imperial Academy, he defected from the Empire's service to join the Rebellion. He and Luke were reunited at Yavin 4's Rebel base, and flew together against the Death Star. Luke returned from that mission as a hero, but Biggs did not survive.
Luke Skywalker looked up to Biggs, who worried that his friend's impetuousness and hunger for adventure would get him into a fix that not even his superior abilities as a pilot could get him out of.
Biggs grew up on Tatooine dreaming of adventures among the stars. He got his chance to escape when his application to the Imperial Academy was accepted, seemingly preparing him for a career as an Imperial pilot.
Biggs was a quiet supporter of the Rebellion against the Empire, and made contact with Alliance agents. He defected from the Empire and became a starfighter pilot at the Rebel base on Yavin 4.
Biggs was a natural behind the stick of an X-wing fighter: He'd trained as an Imperial pilot, and the X-wing handled like a bigger version of the skyhoppers beloved by generations of Tatooine settlers. For the Battle of Yavin, Biggs was assigned the callsign Red 3.
Biggs served as Luke's wingman as his friend raced down the Death Star trench, ready to fire a proton torpedo at the battle station's thermal exhaust port. But Darth Vader was in hot pursuit -- and the Sith Lord blew Biggs' fighter to pieces, ending his life.
Biggs trained at the Imperial Academy as a fighter pilot, and graduated with a commission as an officer in the Imperial Navy. But he had never intended to serve the Empire, and quickly defected to join the Rebellion.