The Night They Drove Old Dixie Down
(Robbie Robertson, 1966)

Written a full century after the American Civil War, and by a Canadian no less, it's still considered one of the better songs written from the Rebel perspective.

Joan Baez had a pretty good run with it in 1971 (#3 on Billboard Hot 100.)

YT: Joan Baez: The Night They Drove Old Dixie Down