Statistics for occurrence #1 of “United States” in chapter 40 of Admiral David D. Porter, The Naval History of the Civil War.:

...lunteers of 1861, who could hardly handle a musket, the Union could boast of nearly a million of veteran soldiers. Grant was now called East to command, as Lieutenant-General, all the armies of the United States ; while his most able coadjutor, General Sherman, with an army of veterans famous on many a field, was to commence his march through the South, and join Grant before the defences of Richmond. The ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 694 0 0 0 user votes
United States (New Mexico, United States) 6 0 0 0 0 user votes

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