Factual error: When we see the United States flag, it is the wrong flag. It has 43 stars, something the flag did not have until 1891.
Revealing mistake: Near the end of the movie, after Jude Law has been shot, he is lying on his back with Nicole Kidman leaning over his face. In the shot looking up at Kidman past Law's left ear, you can see the webbing for Law's wig on his left temple.
Visible crew/equipment: In the scene near the beginning of the film, when the 2 brothers are fixing to leave to join the army. After the mother gives them the flag, the shot changes to the 2 brothers. You can see the boom mic and the camera in the reflection of their shiny brass buckles.
Continuity mistake: The position of the needle and thread lying on Peter's body differ in the wide shot and following close-up. (01:59:10)
Factual error: Catus Decianus actually managed to escape from the massacre at Camulodunum and fled to Gaul.
Factual error: Sarah states that Namibia is on the Ivory Coast, while in fact, it is on the Skeleton Coast in southern Africa.
Factual error: Fairfax was not present at the trial of Charles I, although his wife Anne was, (and was forcibly removed after telling the court what she thought of them).
Factual error: In the opening scene, the German soldiers are searching the Americans. They remove a package of Lucky Strike cigarettes from one of the Americans. This package has the red circle against the green background. Green ink was stopped in 1942 because it uses chromium for green pigment which was necessary for war production of steel. Slogan "Lucky Strike Greens Has Gone to War" was a big advertisement in 1942 with introduction of white background on package.
Continuity mistake: In a party scene about 45 minutes into the movie there are numerous shots of the crowd. Over a several minute period one character was shown in at least four shots while smoking a cigarette in a cigarette holder. In all shots the partially smoked cigarette is the exact same length. Either they kept using the same clip or the cigarette was not lit.
Continuity mistake: Near the beginning of the film, the filthy, mud-covered US convoy mistakenly enters a town. About the time they decide to turn around, their vehicles suddenly appear all clean and shiny. Then, the mud returns again.