Revealing mistake: A the beginning of the attack on Pearl Harbor Destroyer 298 in the harbor. A shot of the ship shows an empty depth charge rack; a subsequent shot shows 1 charge on the rack, a tear shape type which was not introduced until later in the war. When the ship later attacks a Japanese sub the shot shows the old "ash can" charge being dropped.
Revealing mistake: Initially Captain Tory has his promotion orders read at a party (read by Henry Fonda who is presumed to be Admiral Chester Nimitz. He is temporarily promoted to Rear Admiral Lower Half (which is a 1 Star rank). When he arrives at his duty assignment he is wearing 2 stars which is a Rear Admiral Upper Half.