Factual error: During the battle over the fort the British shoot a red flare into the sky. The British army learnt of the effectiveness of rocket weapons when fighting in India in the 1790s. In 1804, rockets (developed by Colonel William Congreve) were introduced into British service. The rocket flare was developed around this time (also by Colonel Congreve). This film is set in the 1750s - the British army would not have had rocket flares (source: Taylor, J.W.R (1970). Rockets & Missiles, Hamlyn, London. PP. 6-10). (00:34:30)
Factual error: At approximately 27 minutes in, when they part company at the airport Douglas is wearing a Combat Infantryman Badge. The CIB was not created until Oct of '43, though the scene was taking place at the end of '41 - early '42. (00:27:05)