Statistics for occurrence #1 of “Hagerstown” in chapter 12 of Edward Porter Alexander, Military memoirs of a Confederate: a critical narrative:

...ally, D. H. Hill's division was to act as rear-guard at Turner's Gap in South Mountain. On Sept. 10, the army marched at daylight. On the road Longstreet was ordered to continue his movement to Hagerstown , while D. H. Hill, leaving two brigades in Turner's Gap, came on to Boonsboro. This change was caused by the collection of a force of Pennsylvania militia at Chambersburg. It was not formidable, ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Hagerstown (Maryland, United States) 2,520 22 172 0 0 user votes
Hagerstown (Indiana, United States) 6 0 2 0 0 user votes
Hagerstown (New Jersey, United States) 4 0 0 0 0 user votes
Hagerstown (Ohio, United States) 4 0 2 0 0 user votes
Hagerstown (Ohio, United States) 0 0 0 0 0 user votes
Hagerstown (Ohio, United States) 0 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.