Statistics for occurrence #1 of “United States” in chapter 11 of Adam Badeau, Grant in peace: from Appomattox to Mount McGregor, a personal memoir:

...return to his own headquarters he wrote the famous letter marked Private, which has already been given to the world. I quote the portion referring to Stanton: headquarters armies of the United States , Washington, D. C., August 1, 1867. His Excellency, A. Johnson, President of the United States: Sir,—I take the liberty of addressing you privately on the subject of the conversation we had...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 258 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.