Flying Leathernecks (1951)

Factual error: John Wayne's squadron lands on Guadacanal as part of the "Cactus Air Force" in August 1942. However, they are flying F6F-3 Hellcats, which were not available, even to the Navy, until the middle of 1943. To top it off, they are painted in a late-war camouflage scheme with late-war markings.

Maj. Daniel Xavier Kirby: Are we all buttoned up?
Joan Kirby: Cat's out... doors locked. All secure sir.