Statistics for occurrence #1 of “United States” in chapter 2.5 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.:

...d dreading from morning to morning the approach of these troops over the Long Bridge. There must have come to Lincoln during these anxious days the dread that he was to be the last President of the United States , and that the torch, representing the life of the nation, that had been transmitted Here the gaunt figure of the Great Emancipator confronted General McClellan in his headquarters two weeks ...
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.