Approved | | Action, Drama, War
The Leathernecks of the film's title is military slang. Leatherneck is a common nickname for marines of the United States Marine Corps (USMC).
Maj. Daniel Xavier Kirby:
Are we all buttoned up?
Joan Kirby: Cat's out... doors locked. All secure sir.
In the scenes where you see John Wayne in the cockpit with the plane facing to the left, you can see the stenciled markings in reverse.