No, they'd just use computer graphics to generate the aircraft at Shiloh.
Actually, for a movie set in the War of Northern Aggression, the Battle of the Crater might make better film.
The movie would actually pass politically correct muster because of the treatment of the "Colored Troops" by the racist Union officers. (The Blacks were specially trained to spearhead the attack, but were replaced in that role by white troops that hadn't been properly trained for the job. The Blacks were then used as cannon fodder).