Statistics for occurrence #1 of “Sharpsburg” in part 1.2, chapter 1.5 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 2: Two Years of Grim War.:

...hen Burnside's tardy advance began, it must have prevailed against the weakened and wearied Confederates had not the fresh troops of A. P. Hill averted the disaster. In the advance along the Sharpsburg road near the Sherrick house the 79th New York Highlanders deployed as skirmishers. From orchards and cornfields and from behind fences and haystacks the Confederate sharpshooters opened upon them...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Sharpsburg (Maryland, United States) 3,371 32 131 2 0 user votes
Sharpsburg (Ohio, United States) 166 0 12 0 0 user votes
Sharpsburg (Kentucky, United States) 4 0 2 0 0 user votes
Sharpsburg (Pennsylvania, United States) 1 0 1 0 0 user votes
Sharpsburg (Georgia, United States) 0 0 0 0 0 user votes
Sharpsburg (Illinois, United States) 0 0 0 0 0 user votes
Sharpsburg (Iowa, United States) 0 0 0 0 0 user votes
Sharpsburg (Louisiana, United States) 0 0 0 0 0 user votes
Sharpsburg (Mississippi, United States) 0 0 0 0 0 user votes
Sharpsburg (Missouri, United States) 0 0 0 0 0 user votes
Sharpsburg (North Carolina, United States) 0 0 0 0 0 user votes
Sharpsburg (Ohio, United States) 0 0 0 0 0 user votes
Sharpsburg (Ohio, United States) 0 0 0 0 0 user votes
Sharpsburg (Pennsylvania, United States) 0 0 0 0 0 user votes
Sharpsburg (Pennsylvania, 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.