Statistics for occurrence #1 of “Boonsboro” in chapter 19 of Maj. Jed. Hotchkiss, Confederate Military History, a library of Confederate States Military History: Volume 3, Virginia:

...avalry and Reno's corps, in one of the most desperate of all recorded contests, until the middle of the afternoon, when Hooker's corps, in furious onset, fell on his left near Turner's gap, where the Boonsboro and Frederick road crosses, and added to the fury of the contention. Lee then sent in 4,000 of Longstreet's men, in eight brigades, to sustain the brave Hill and his unyielding North Carolinians, a...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Boonsboro (Maryland, United States) 743 48 41 0 0 user votes
Boonsboro (Virginia, United States) 38 0 0 0 0 user votes
Boonsboro (Maryland, United States) 0 0 0 0 0 user votes
Boonsboro (Missouri, 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.