Star Wars (1977) #16 and Star Wars: Han Solo - Imperial Cadet #1

Valance was an Imperial officer who was severely wounded in battle.  Needing cybernetic parts to survive, Valance left behind his military career and became a bounty hunter.  Valance the Hunter was introduced in Star Wars #16 in 1978.

Star Wars #16a - Marvel Comics, U.S. (October 1978)

Forty years later, Valance is re-introduced, this time in new continuity, in Han Solo - Imperial Cadet #1.  Initially known as cadet 404-913, he is assigned to the same squadron as Han Solo during basic training on the planet Carida.  Valance is arrogant and a bully to his teammates.  The squadron graduates to flight school where cadet 404-913, now known as Valance, is top of the class.  In issue #4, we learn Valance's first name is Beilert and his squadron is assigned their first combat mission.  After the squadron takes out the shields and cannons in the city Howlan on the planet Ohulosk, Valance's TIE Fighter is shot down by local insurgents.  The rest of the squadron return to base and, despite his pleas, Han Solo is forbidden to return to rescue Valance in a TIE Fighter.  Han decides to go after Valance regardless and, using speeder bikes, he and the rest of the squadron mount a rescue.  In issue #5, Valance is recovered by his squadron, but he is surprised to learn the Empire did not condone his rescue.  Back at base, we learn Valance lost a leg and an eye due to injuries from the crash.

Star Wars: Han Solo - Imperial Cadet #1a - Marvel Comics, U.S. (November 2018)

Valance the Hunter is returning this week in Star Wars #108, a one-shot that is continuing Marvel's original run.  While that story takes place in the expanded universe continuity, fallen Imperial officer Beilert Valance from the Han Solo - Imperial Cadet mini-series will be returning in Target Vader due to be published in July.  In this mini-series, Valance, now a bounty hunter, is leading a group of bounty hunters hired to kill Darth Vader.