Deliberate mistake: When Alexander is giving his pre-battle speech at Gaugamela, some of the shots are 'flipped', which has the odd effect of suddenly making all of the phalanx pikemen left-handed.
Alexander (2004)
1 deliberate mistake - chronological order
Directed by: Oliver Stone
Starring: Anthony Hopkins, Colin Farrell, Angelina Jolie, Val Kilmer, Jared Leto, David Bedella, Jessie Kamm
Factual error: The backdrop to the party scene in India shows a large building with glass windows. The Romans were the first to use glass windows some 300 years later.
Alexander: While in your mind and body are stretched to breaking you have no thought beyond the next. And you look back then and there it was, happiness. In the doing, never the thinking.
Trivia: Even though Angelina Jolie plays Colin Farrell's mother in the movie, she is only a year older than Farrell.