 FAKE: The battle of Little Round top takes place on the hot  afternoon of July 2. Yet after the battle, as Chamberlain speaks to  the wounded Sergeant Kilrain, you can see the actors breath as  "Kilrain" speaks his lines, evidence that the air was much colder  than on a July afternoon. The same thing occurs later in the film  when a messenger climbs Big Round Top to speak with Chamberlain. The  messenger is breathing heavily, and the vapor of his breath is  visible.