Will Eisner--best known for his influential comic book series The Spirit and his groundbreaking graphic novel A Contract with God --believed in the teaching power of comics, and from 1951 to 1971 he produced PS magazine for the U.S. Army. This Preventive Maintenance Monthly (called PS because it was a postscript to the standard technical manuals) was aimed at teaching American soldiers everything about weapons safety for vehicles, aircraft, firearms,...