---
title: George H. Thomas: The Rock of Chickamauga
author: Mathew Brady
source: https://www.worldhistory.org/image/21169/george-h-thomas/
format: machine-readable-alternate
updated: 2025-10-10
---
# George H. Thomas: The Rock of Chickamauga
_Authored by Mathew Brady_
## Image File
[](https://www.worldhistory.org/uploads/images/21169.jpg)
## Image Caption
Portrait of George H. Thomas, photograph by Mathew Brady, c. 1855-1865.
Known as the "Rock of Chickamauga," Union Major General George Henry Thomas (1816-1870) played important roles in several key battles of the [American Civil War](https://www.worldhistory.org/American_Civil_War/), including the [Battle](https://www.worldhistory.org/disambiguation/battle/) of Chickamauga, the [Atlanta Campaign](https://www.worldhistory.org/Atlanta_Campaign/), and the [Battle of Nashville](https://www.worldhistory.org/article/2816/battle-of-nashville/).
Library of Congress, Washington, D.C.
## Cite This Work
### APA
Brady, M. (2025, October 10). George H. Thomas: The Rock of Chickamauga. *World History Encyclopedia*.
### Chicago
Brady, Mathew. "George H. Thomas: The Rock of Chickamauga." *World History Encyclopedia*, October 10, 2025. .
### MLA
Brady, Mathew. "George H. Thomas: The Rock of Chickamauga." *World History Encyclopedia*, 10 Oct 2025, .
## License & Copyright
The public domain content above is from the [Library of Congress](http://www.loc.gov/). You can copy it freely. [Original image](https://www.loc.gov/pictures/item/2017895704/) by [**Mathew Brady**](https://www.loc.gov/pictures/item/2017895704/). Submitted by [Harrison W. Mark](https://www.worldhistory.org/user/harrisonwmark/ "User Page: Harrison W. Mark"), published on 10 October 2025. The copyright holder has published this content under the following license: [Public Domain](http://en.wikipedia.org/wiki/Public_domain). This item is in the public domain, and can be used, copied, and modified without any restrictions. Please note that content linked from this page may have different licensing terms.