Statistics for occurrence #1 of “United States” in chapter 10 of Col. J. J. Dickison, Confederate Military History, a library of Confederate States Military History: Volume 11.2, Florida:

...d States navy. He participated in the Mexican war as a staff officer with the rank of lieutenant. At the time of the threatened seizure of Fort Pickens, near Pensacola, Fla., he was still in the United States service commanding the United States ship-of-war Brooklyn. Soon after the secession of Florida he resigned his commission in the navy of the United States and entered the service of the Confederate...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 80 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.