Statistics for occurrence #1 of “Potomac River” in chapter 4 of Admiral David D. Porter, The Naval History of the Civil War.:

... Potomac River
Conjectures and uncertainties. Secessionists and the Potomac. Secessionists erect batteries in sight of the capital...

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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Potomac River (United States) 286 12 0 0 0 user votes
Potomac River (Maryland, United States) 2 0 0 0 0 user votes
Potomac River (Maryland, United States) 2 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.