Factual error: Listening to a radio broadcast, live, since no other indication is given, Joe Louis is completing the 12th round of a fight. This is December 6, 1941. Joe's last fight of 1941 occurred in September, his next fight was January 1942. (00:00:10)
Factual error: In scenes that take place in 1912 on the porch of the hotel you can sometimes see American flags in the background. The flags in the movie have 50 stars. The 50 star flag wasn't adopted until after 1959. (01:25:15)
Factual error: When Loretta and Patsy return from shopping, and Doolittle gets mad about the makeup Loretta is wearing, look closely after they leave Doolittle and you will see a 1965 LeMans among the parked cars. Patsy Cline died in 1963.
Factual error: A film about the making of a film. A car is filmed going off a bridge, and the footage is played back repeatedly. Throughout, the car is referred to as a Duesenberg, even though, in nearly every shot, the Mercedes tri-sected circle logo is visible above the radiator.
Factual error: Despite being on an island for a long time, Emmeline has no body hair anywhere.
Factual error: During all the major battle scenes involving tanks the Germans are using post-WWII tanks. The turret looks a bit like the M10 Wolverine with a top cover.
Factual error: The older woman, Grace, tells Susan Sarandon's sister that both their husbands died from being shot. Susan Sarandon's sister's husband was not shot, he was stabbed to death.
Factual error: In the ambush-on-the-prison scene, one of the Boers is equipped with a Lee-Enfield CLLE Charger-Loading Rifle. Although the Boers used many captured Lee-Enfield and Lee-Metford rifles, the CLLE's weren't even developed until the Boer War had ended.
Factual error: In the beginning during the opening credits, Bud is using a map to find his Uncle Bob's house in a new housing addition. A new home in a new addition (where they are still building), would not be on a paper map yet.
Factual error: When they first meet, Rodrigues tells Blackthorne that aboard his ship there is plenty of food and grog. The problem is that grog was not "invented" until 1740, when it was introduced into the British Navy by Admiral Edward Vernon, who was nicknamed "Old Grog" because of his habit of wearing a grogram coat.
Factual error: In an attempt to create a believable 1940s gym, it appears the production crew got hold of many contemporary boxing posters as possible. Most of these were Greeked to avoid mentioning real boxers (such as "Dave Ritlaf" and "John Paropianeo"), but one of these prominently features a "Ronnie Harris", along with a photograph. Ronnie Harris was a real boxer, but wasn't even born until 1948, 7 years after this scene was set, giving away that a poster from the '70s was used. (00:16:08)
Factual error: When they find the safe they find it is watertight, but a watertight safe at that depth would have imploded from the pressure.