From the title, I did not think things were going to go great for him.

The cover pulled me in, and I had guessed this was from the tailend of the series, after they had maybe course corrected back to being a more traditional war comic. Not quite! From 1983, Blackhawk #259, "The Tomb of the Unknown Blackhawk!" Written by Mark Evanier, art by Dan Spiegle. Cover by Howard Chaykin! 

Winslow Shirk leads a sad, gray life: being a nobody would be several steps up for him. So would a 4-F classification, the draft board describes him as "7-W...the only time you go is when the enemy is on the Triborough Bridge, heading west!" But, after a newsreel, Winslow decides to make something of himself, and join the Blackhawks! I feel like knowing how to fly a plane would be a prerequisite for joining, but the first step might be simply to find the Blackhawks. Their base wasn't public knowledge, but while Winslow manages to find Blackhawk Island, it was a smoldering, radioactive crater; nuked in the previous issue! (That was reprinted in Best of DC #52, which probably got it in front of a lot more eyeballs!)

Here's where the weirdness starts: exposure to the radiation turns Winslow invisible. Stripping down to his glasses, he infiltrates British intelligence, then follows a officer to the Blackhawks in the field and gets to see them in action. He also notes they seemed to be a man down: Stanislaus was still in infirmary, now with a crisis of confidence. Blackhawk catches up to the Nazi leader, and discovers--Hitler? In the field? With a trick electrical field and an escape balloon, he gets away; and the Blackhawks recall they had seen no less than five Hitlers escaping a Nazi lab a few issues prior. Winslow invisibly hitchhikes back to "Blackhawk Island II" with the team, and listens in as Blackhawk and Stanislaus hash things out. The full squadron then deploys to defend Wilson Churchill, leaving Winslow behind in a borrowed uniform--hey, it's cold! But, Winslow is the only one to get a late message: Churchill wasn't at Downing Street, he was in Belvar! In his borrowed uniform and a latex mask used in an interrogation, Winslow convinces a mechanic to fly him to Belvar, then leaps into action to defeat the Hitler-lookalike. (When his mask comes off mid-fight, faux-Hitler nearly wets himself!)

Winslow disappears after saving Churchill, who sends a bronze statue of the Unknown Blackhawk to the team. And he becomes visible--after sneaking onto a ship back to America! One suspended sentence later, Winslow returns to his apartment, and paints it bright orange: "you don't have to confront the enemy to be a hero. You just have to confront yourself." Eh, confronting a Hitler is pretty good, too.