Statistics for occurrence #1 of “Potomac river” in chapter 55 of The Annals of the Civil War Written by Leading Participants North and South:

... properly understand the raid that was made into the State of Pennsylvania, and which resulted in the destruction of Chambersburg. Hunter's army (Union) was scattered along the northern bank of the Potomac river , in Maryland, from near Hancock to Harper's Ferry, the main body being near the latter place. Early's army (Confederate) was located on the opposite side of the same river with its main body near M...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Potomac River (United States) 286 2 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.