Gettysburg (1993)

Revealing mistake: In one of Pickett's charge scene the bayonets are obviously rubber.

Col. Arthur Freemantle: You call yourselves Americans, but you're really just transplanted Englishmen. Look at your names: Lee, Hood, Longstreet, Jackson, Stuart.
Lieutenant General James Longstreet: My people were Dutch.
Col. Arthur Freemantle: And the same for your adversaries: Meade, Hooker, Hancock, and - shall I say - Lincoln! The same God, same language, same culture and history, same songs, stories, legends, myths - different dreams. Different dreams. So very sad.

Trivia: Virtually all of the extras who play soldiers in the film were members of Civil War Re-enactor groups who not only freely donated their time but also supplied their own uniforms and equipment. This ensued that the film-makers did not have pay for their own extras and that they could stage the massive battle scenes without blowing the budget.