Factual error: Just after Lyndon Johnson announces that the air mobile units will be sent to Vietnam (1965), a dance/party scene has everybody dancing and singing 'Hold On I'm Comin' by Sam and Dave. It was a hit, but not in 1965. It was a mid/late 1966 hit, almost a year after that party. The Ia Drang Valley battle took place in November, 1965, before that song was recorded.

Factual error: Towards the end of the movie, at the last fight scene, you see the 1st air cav charging the NVA. As they go over a hill, you see the NVA waiting for them and then a helicopter gunship hovers down and kills all of the enemy. The gunship was using mini-guns which fires 6,000 rounds a minute. These were not used in Vietnam until late 1967. and were not in-country in 1965. In 1965, the gunships had two Flex M-60 machineguns on each side.