Statistics for occurrence #1 of “Tennessee” in chapter 7, page 172 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:

...and October 20, 1863. The army distinguished itself on Missionary Ridge and through the Atlanta campaign (as a part of the Military Division of the Mississippi), and in the campaign against Hood in Tennessee . The army had four divisions of cavalry. It had a reserve corps for a short time, and received two corps from the Army of the Potomac, which were finally consolidated into the reorganized Twentie...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Tennessee (Tennessee, United States) 26,198 148 4 0 0 user votes
Tennessee (Arkansas, United States) 0 0 0 0 0 user votes
Tennessee (Illinois, United States) 0 0 0 0 0 user votes
Tennessee (New Mexico, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.