Statistics for occurrence #1 of “Harper's Ferry” in chapter 1 of General Joseph E. Johnston, Narrative of Military Operations During the Civil War:

...the west (Furnace Ridge) side. Two main routes lead from Maryland and Pennsylvania into the Valley of Virginia, meeting at Winchester: one passing through Frederick, and crossing the Potomac at Harper's Ferry ; the other leading through Chambersburg, Williamsport (where it crosses the Potomac), and Martinsburg. These roads are met at Winchester by the principal one from Northwestern Virginia into the Val...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Harper's Ferry (West Virginia, United States) 10,974 104 304 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.