Revealing: John Wayne suffers a broken arm and goes for a x-ray wearing a cast. At the bottom of the cast a slit is visible which allows the fake cast to be easily removed.

Factual error: Throughout the film the characters are often seen riding in M151 jeeps (horizontal grill slits) which were not in production until the Vietnam era. Odd because they did have a few correct era Willy's jeeps on the set, usually seen in the background

Factual error: Commander (later Captain) Eddington has a problem identifying warships. At Pearl Harbor, he incorrectly identifies USS Providence (CL82) as an AA cruiser (hull's in the 50's). Then, while piloting the PBJ in search of the Japanese fleet, he identifies the Yamato as having 12 main guns.

Factual error: The film takes place during World War II yet the hair styles of the females, particularly the young ones, are straight out of 1965 when the film was released.

Continuity: When Kirk Douglas boards the PBJ bomber, taxies to the runway and takes off, he is sitting in the right-hand seat. During the rest of his scene in the plane he's in the left-hand seat.

Continuity: When Hugh O'Brian and Barbara Bouchet are driving up from the beach during the Japanese attack, they are in a Lincoln convertible. When the car explodes and goes over the cliff, it is either a Ford or Mercury convertible.

Factual error: The San Francisco house that Paula Prentiss leaves in order to catch the trolley to meet with her husband Tom Tryon's arriving ship is located on the corner of Lombard and Hyde Street. Famous for being the most crooked street in the world, is a mile and a half from the piers. In a later scene they are indoors when Tom Tryon pulls a shade down, you can see the San Francisco Bay Bridge and piers just below. This view would mean the house has moved to San Francisco's Telegraph Hill, the only location with such a clear view of the bridge, which is quite a distance away from the house's original location.

Continuity: During the discussions right after the attack on Pearl, between CINCPAC and all the admirals over the plotting table, Dana Andrews is nowhere to be seen. Then after a quick cut away and back, suddenly he is there just to the right of CINCPAC with all the other actors magically rearranged to make a space for him.

Continuity: In the first few scenes concerning Captain Torrey's task group, the weather is sunny and clear (as it was Dec. 7, 1941). However, at one point when Cmdr Eddington enters the bridge, he is in very wet foul weather gear, and the same when they go into the coding room to decode the message to "seek-out" the enemy. Later when steaming toward the enemy the weather is clear again.

Factual error: Just before John Wayne's ship is torpedoed there are several shots of a neighboring destroyer out of the bridge's windows. The bow number is 298. DD-298 is the USS Percival, which was launched on 5 December 1918 and decommissioned on 26 April 1930 and scrapped in 1931. This is over 10 years before the beginning of WWII.

Factual error: During the final battle scene, none of the Admiral's staff, including the Admiral are wearing battle gear, i.e. helmets & life jackets, as required by the navy.

Revealing: 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.