I read a short story a long time ago (70s?) where Stone Mountain's carving were obliterated by artillery fire, after a Communist take over.
I remember that story I think it was part of a collection of science fiction alternate history stories.
There was another entitled “Custer’s Last Jump”, wherein the 7th Air Cavalry parachute balloon infantry is decimated by a squadron of former Confederate Air Force fighters led by Crazy Horse, lol.
The story is told in the form of extracts from first-person accounts drawn from letters, diaries and newspaper articles of the period.