Statistics for occurrence #1 of “United States” in chapter 14 of Brig.-Gen. Bradley T. Johnson, Confederate Military History, a library of Confederate States Military History: Volume 2.1, Maryland:

...age, the majority, of the officers in the army and navy of the United States from Maryland, resigned their commissions, and entered the service of the Confederacy. Captain Franklin Buchanan, United States navy, became Admiral Buchanan in the Confederate service. He commanded the iron-clad Virginia when he sank in Hampton Roads the Congress and the Cumberland,--two of the best men-of-war in the navy ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 136 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.