Goofs

As Jack is bending over Ying, his lieutenant's bars are fastened to his flight jacket correctly, at right angles to the line of his epaulettes. Moments later, on the boat, the bars are fastened incorrectly, straight along the epaulettes.

The opening scene over Tokyo shows them shooting down a Zero. In fact, the guns were removed from the B25's to save weight. The guns were replaced with broomsticks, painted black, in hopes of scaring off Japanese pilots.

Only the tail gun was replaced by a broomstick and the belly turret was removved. The B25s did retain their dorsal turret and nose guns and 2 crewmen claimed to have shot down Japanese fighters during the raid.

Early in the film, one of the two interrogating officers congratulates Jack on the success of the raid. Jack replies, "Thank you, Lieutenant." The officer in question clearly wears the silver eagles of a full colonel.

The Chinese airfields were not warned in advance of the arrival of the Doolittle raiders and many turned off their lights and sounded air raid sirens because they did think they were Japanese bombers. They did not turn off the lights because the earlier arrival was unexpected; the entire arrival of US bombers was unexpected.

Admiral Halsey was supposed to send a signal to the Chinese airfields but did not do so for fear of signaling presence of his carrier force which launched the raiders.

Eglin Air Force base was not named so until 1948 after WW2. Its name during WW2 would have been Eglin Field.