Factual error: An old man appears with children following him. This is supposed to be pedagogue Janusz Korczak. It appeared as if he was just wearing a suit and a Jewish arm band. In the Warsaw Ghetto, Mr. Korczak never wore an arm band and wore his WWI Polish Army Uniform, both as acts of defiance. He was beaten and almost put to death (he had connections) for not wearing an arm band so having one on in the movie is inaccurate.
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.
Continuity mistake: When Hart was being introduced to the new barracks, Sgt. Pepper had his chevron and 25th infantry patch on his shoulder, then he didn't, then, he did.
Factual error: In the first scene, Iraq invades Kuwait City and the Kuwaitis flee from the theater into a sunny backdrop. The problem is that the invasion actually took place at 1:00AM Gulf time. I don't think there are many movie theaters open at 1:00 in the morning, and I don't think it's sunny then either.
Factual error: Max and his family listen to a radio broadcast announcing the terms of the Versailles Treaty in Germany in 1919. Radio broadcasting first began in the United States in 1920 and began in Germany in 1923. Also, the radio they are listening to is a "cathedral" type that was not manufactured until the 1930s.