As the Union Soldiers marched into battle, they sang "The John Brown Song," later known as "John Brown's Body," whose tune years later with the words changed became "Battle Hymn of the Republic."
Maya Hawke, daughter of Ethan Hawke, creator of the show, plays Annie Brown, one of the daughter of John Brown.
Principal photography began July 2019--the hottest July in recorded history.
Wyatt Russell (J.E.B Stuart) is the son of Goldie Hawn and Kurt Russell
A "Good Lord Bird" is a Pileated Woodpecker, a very large species of woodpecker that can glide silently, startling a person who sees it unexpectedly. The name comes from people saying, "Good Lord, what kind of bird is that?" or something similar.