Pin-Ups on US official documents!
The U.S. Army also placed pin-ups on the front of map update documents during WWII. This in an attempt to assure that the person in command of a unit, but also the common GI (according to the remark: "For general distribution. NOT for staff use only") would use the latest available maps.
Propaganda leaflets of World War 2: Italian theatre of operations / "ESSAYONS" - "Let Us Try" / The US Army Corps of Engineers