Born on Corellia to a middle income family, Roy's early childhood was uneventful for the most part. His parents worked for one of the largest shipyards on the planet and Corellia was mostly unaffected by the Clone Wars. After the Clone Wars, however, the Empire imposed its presence on the planet and bought out the shipyards Roy's parents worked at. What was a middle class family soon became a low income household, and they soon found themselves evicted from their home. In his early teens Roy fell in with a bad crowd and started stealing speeder bikes. When he was eventually caught by Imperial authorities, he was given the choice between a one way ticket to Kessel or joining the Imperial Academy.
He did well in the Academy, getting high marks, and was finally interested in higher education, having his eyes on a career in Archaeology, before he was recruited into Imperial Flight School. It was here that he received his call sign, Lock, for being so hardheaded and single minded at times, like a missle that was locked on. At the age of nineteen he graduated as a TIE Fighter pilot.
After bouncing from unit to unit for a few tours of duty, Lock eventually found himself recruited into Imperial Commando Extraction Squadron, or ICE Squadron, a specialized airborne commando unit specializing on sneaking behind enemy lines and extracting Imperial assets. Though he excelled in this field, Lock began to see more and more of the darker side of the Empire and things he was ordered to do didn't sit well with him… but what was he supposed to do? Go back to the neighborhood he'd grown up in in Corellia? Become a smuggler? He managed to stick it out a little while longer until he met her.
She was an Imperial Agent who had gone through so many modifications that she had forgotten who she really was. Though brainwashed to serve the Emperor, she was becoming increasingly unhappy with what she saw and attempted suicide--only to be saved by Lock. A small romance blossomed between the two and eventually they formulated a plan to get away from the Empire. For the purpose of this, Lock made contact with a Rebel Agent who promised to help in exchange for their help--he needed Lock to plant a bomb in the Command center. Lock struggled with this but she did not; she simply did what had to be done and amidst the carnage, they were smuggled out by the Agent.
Over the next year, they went from planet to planet as fugitives. Somehow the Empire continued tracking them down, over and over, until she realized that they were tracking her hardware. Letting herself get caught, she once again used a bomb to free Lock from the clutches of the Empire. Devastated, Lock turned to heavy drinking.
It wasn't long before the Rebellion found him and he discovered a way to get back at the Empire. He started out in a Y-Wing Squadron, where he met his good friend Dirr “Jet” Sol, a fellow Corellian. After a fairly disastrous mission in which only he and Jet survived, Lock was reassigned to Rainworld, a hidden rebel starfighter training base, where he met Frosty, a future close friend, and Gremlin, a future protege. Jet would return, informing him that the Rebels had decided to form a Squadron out of the Cadets and Jet wanted Lock to be his XO. Bantha Squadron's first mission was a disaster, where Jet himself was killed. The remaining pilots would be transferred into the newly minted Red Squadron under the command of a mandalorian mercenary named Flash.
Battle after battle would decimate Red over and over again, but slowly it forged battle hardened pilots. Red found itself receiving members from the Rancors, an elite Commando unit, and cross training began. The Reds eventually became a force to be reckoned with and for nearly four years Lock lead them into battle though to the loose organization of the Rebellion, and the clandestine nature of Red's activities, they were most and unsung, anonymous group of fighters and rarely received any sort of acclamaides or recognition--which is why Lock never rose above the rank of Brevet Captain (or in his words, a glorified Lieutenant--enough clout to order around other Lieutenants but still have to shut his mouth around real Captains). In any case, it wasn't a very big deal to him and his pilots wouldn't give a damn how many pips were on his collar anyways.
Shortly before the Battle of Endor, Red was disbanded and divided into Wedge's Red and Lando's Gold Squadrons. Though they proved their worth in the Battle, Starfighter Command decided to reallocate resources into Renegade Wing, where Lock found his new home.