Statistics for occurrence #1 of “United States” in chapter 2.6 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 1: The Opening Battles.:

...lorida, two days before Alabama seceded, two regiments of Alabama troops were sent to co-operate in the seizure of the navy yard and forts at Pensacola Bay Who shall estimate the value to the United States of the services of its navy which thus isolated the Confederacy, cut it off from communication with the outside world, and at the same time compelled it to guard every point against a raid like that ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 56 0 0 0 user votes
United States (New Mexico, United States) 6 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.