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.
Continuity mistake: During combat a pilot is shown to be wounded in his right leg. As he is coming in to land, two further shots of him in the cockpit now show him to be wounded in his left leg. Some blood stain patterns on his gear, also the position of his helmet chin strap, also change position from left to right.