My avatar comes from an Army pamphlet called "I've Got Wings!" It's an out-and-out comic book that summarizes the flying rules of the road.
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It's aimed at potential pilots, though, not as an actual training manual. "Learn what this booklet has to tell and you have taken a long step toward the day when you can say, 'I've got wings'."

Pamphlet doesn't include a copyright page or any sort of date, but it does say it was published by the U.S. Army Air Forces Flight Command. That puts the date to mid-1941 or later.

I've also got a WWII-era Civil Air Patrol cadet manual. No cartoons, but a lot of illustrations. Such as showing the cadets how to administer morphine....

Ron Wanttaja