Statistics for occurrence #1 of “Fort Whipple” in chapter 6, page 83 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

... Fort Whipple
In the background rises the dome of the Capitol which this regiment remained to defend until it was ordered to Petersburg, ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Fort Whipple (Arizona, United States) 67 8 1 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.