As happens far too often in war, many young hopefuls are never allowed the chance to grow into seasoned veterans.
Biggs Darklighter is one example of this sad fact.
Biggs was Luke Skywalker's childhood friend on Tatooine. The two grew up together and spent much of their reckless childhood careening their T-16 skyhoppers through Beggar's Canyon. They called each other a couple of "shootings stars."
Darklighter was able to live out Luke's long-held dream of joining the Academy. Skywalker, however, had to stay behind on his uncle's moisture farm. When Biggs returned to Tatooine, he was a changed man. He opened Luke's eyes to the true nature of the Empire, and confided in Luke that he had defected from the Empire to join the Rebel Alliance.
Biggs and Luke were reunited a short time later on the fourth moon of Yavin. Together they flew in Red Squadron as they attacked the Death Star approaching the Rebel base. Although Luke was ultimately successful in destroying the Imperial battle station, Biggs was killed when his starfighter was shot to pieces by Darth Vader.