Statchel inspiration for 'Enemy Ace' comic book?

I think DC Comics' Enemy Ace (real name Hans Von Hammer) was based on Manfred Von Richthofen (the Red Baron), who was credited with shooting down 80 Allied planes. The Blue Max's Bruno Stachel wasn't a very admirable guy in either Jack D. Hunter's book or the movie. In fact, Stachel was even nastier in the book. SPOILERS ahead: In both movie & book, Stachel was a ruthless opportunist who stomped on anybody who got in his way of becoming an ace, but in the book he was also an alcoholic and deliberately killed Willie Von Klugermann. In the movie, Von Klugermann crashed while having a contest with Stachel flying under a bridge, but in the book, while both pilots were flying in bad fog, Stachel arranged to have his plane suddenly appear in front of Willie's plane causing Willie to swerve and crash.) P.S. In the book, Stachel didn't die, in fact, he's in a couple more books called The Blood Order and The Tin Cravat.

No because The Enemy Ace had "Von" in front of his name which meant he wasn't a peasant like Stachel. And would Von Hammer ever lie about his victories? and enthusiastically shoot down helpless enemies searching for glory? No way! Von Hammer admired all the men he shot down and went out of his way to avoid killing them. Also Von Hammer didn't drink! And he wasn't too good with the ladies! He woulda blasted Stachel outta the skies

According to the Wikipedia entry for "Enemy Ace," the character debuted in February, 1965, more than a year before "The Blue Max" film was released (though roughly the same time that Jack D. Hunter's novel was first published). Frankly, I have long thought "Enemy Ace" was highly overrated -- revelatory only for those who restrict their reading to comic books.

BUT -- what really sparked popular interest in WWI aviation in the mid-1960s was -- wait for it -- Charles Schulz's "Peanuts" comic strip. I haven't been able to pinpoint the date, but sometime c.1965 Schulz started perching Snoopy on top of his doghouse, wearing helmet and goggles and barking "Curse You, Red Baron!" Seriously, I believe it was the reference in the exceedingly popular daily comic strip that started lots of people reading about Richthofen and eventually would lead to the movie "Brown and Richthofen" and Snoopy vs. the Red Baron video games. Schulz got there ahead of either "Enemy Ace" or "The Blue Max." (I know Hunter's novel was pretty much his own creation, but I would wager that 20th Century Fox decided to make the movie based on the interest that Snoopy was creating. Where Schulz got his inspiration -- hard to say.)

What I want to know is, how did Richthofen get snagged into selling pizzas?