Factual error: As the 1st Battalion, 7th Cavalry lifts off from LZ X-Ray at the end of the battle, it can be seen that there are no more American troops left at the battlefield. However, by the time 1/7 CAV left LZ X-Ray, it had been relieved by two full battalions (2/7 CAV and 1/5 CAV). There were around 700 American soldiers occupying LZ X-Ray by the time 1/7 CAV lifted off.
Factual error: Many shots of the submarine in drydock show Halifax, Nova Scotia's MacKay and MacDonald bridges in the background.
Factual error: One of the members of the orchestra is reading off sheet music held together by sticky tape, which is an anachronism.
Factual error: In various shots throughout the film "Sky TV" style satellite dishes can be seen on houses - the film is set in 1972 many years before satellite TV existed.