Statistics for occurrence #1 of “United States” in chapter 8 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.:

...of ammunition. Efforts were made to encourage the private manufacturers in the Northern States to increase the capacity of their plants, and to provide a uniform pattern. The Springfield model of United States rifle was then the standard. The arsenal was kept in model condition throughout the war. In the yard were stored thousands of heavy and light cannon, with hundreds of thousands of projectiles of ev...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 92 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.