At the beginning of this WWII film, supplies are parachuted to the troops. On several of the boxes, USAF was stenciled on the boxes. The United States Air Force was not named until 1947 and the stencil should have read USAAF (United States Army Air Force).
Just before the commandos attack the Japanese patrol, Sgt. Jim Nortby is reading a Tom and Jerry Comic Book. The cover is in late 1950s style, and they would never have even had a comic in that shape in a deep penetration operation such as what they were on.
When Capt. Tom Reynolds (Frank Sinatra) is in the bungalow awaiting the visit from the head of OSS, he puts his feet in a small metal tub and begins pouring whiskey over them, apparently disinfecting his feet. The start of the sequence shows him putting his feet in the tub, then another scene from behind shows him pouring the whiskey into the tub from about chest level (as he is sitting on the couch), but we cannot see the tub or his feet but we can hear the whiskey splashing directly into the metal tub. In two subsequent scenes from a head-on frontal view, as the general and his aide come into the room, but with a small table blocking the view of the tub or feet, Capt. Reynolds is still pouring the whiskey into the tub and we can hear it still splashing into the tub, but Capt. Reynolds' legs are clearly splayed outwardly far enough that his feet are obviously not in the tub but straddling it.
In the lounge scene where Capt. Reynolds punches and falls to the floor with Capt. Mortimer, Reynolds stands and buttons the top button on his tunic. The same button is seen buttoned and unbuttoned a few more times over the next minute.
When Frank, Gina and Richard go horseback riding the woman is wearing a wide brimmed hat but in the close up scene at the temple Gina has a much more fashionable hat with a narrower brim and wider scarf.
When Frank's troops attack the Chinese camp and shoot the leaders in their hut the scene continues with Frank and his team wandering around the room without tripping over the three bodies. Then when one of the fallen men picks up a gun and kills De Mortimer who falls dead where one of the other bodies was previously laying.
Frank is 5'7" and Gina is 5'5" and yet throughout the movie she is in high heels and in the shots appears substantially shorter than Frank. In the greenhouse with the orchids the height difference fluctuates in each shot.
During the attack on the enemy camp, when the OSS guys reveal themselves and open fire from trucks as they drive by the tents full of sleeping enemy, two trucks are side-by-side shooting in the same direction, meaning the gunners in one truck are shooting directly in the backs of the gunners in the other truck.
When the air drop of supplies is made at the beginning of the film there is a scene of Japanese observers watching from high up in a tree, then shots supposedly showing what they were seeing through binoculars. The binocular shots are clearly filmed from a ground position, not as they would have been seen from the tree.