18–20 September 1863 The Battle of Chickamauga was fought between the United States Army and Confederate forces in the American Civil War.
Battle of Chickamauga, article from Wikipedia     https://en.wikipedia.org/wiki/Battle_of_Chickamauga

ROCK OF CHICKAMAUGA  - Various recordings on YouTube by Jimmy Driftwood      https://www.youtube.com/results?search_query=jimmy+driftwood+rock+of+chickamauga
ROCK OF CHICKAMAUGA  - written by Gwendolyn Grant      https://www.youtube.com/watch?v=xnUaRX5XjUQ
THE UNION’S ROCK OF CHICKAMAUGA   - James Bray       https://www.youtube.com/watch?v=UFQJttzBBQk