Statistics for occurrence #1 of “Yorktown” in chapter 5.16 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 1: The Opening Battles.:

... the Zouaves whose bright and novel uniforms were so conspicuous early in the war. This spot was directly on the line of the British fortification of 1781. (Confederate ramparts southeast of Yorktown .) A 32-pounder Navy gun which had been burst, wrecking its embrasure. The Federal soldier seated on the sand-bags is on guard-duty to prevent camp-followers from looting the vacant fort. (...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Yorktown (Virginia, United States) 5,134 111 356 3 0 user votes
Yorktown (Arkansas, United States) 16 0 0 0 0 user votes
Yorktown (Pennsylvania, United States) 5 0 1 0 0 user votes
Yorktown (Illinois, United States) 0 0 0 0 0 user votes
Yorktown (Indiana, United States) 0 0 0 0 0 user votes
Yorktown (Iowa, United States) 0 0 0 0 0 user votes
Yorktown (Kentucky, United States) 0 0 0 0 0 user votes
Yorktown (Maryland, United States) 0 0 0 0 0 user votes
Yorktown (Missouri, United States) 0 0 0 0 0 user votes
Yorktown (New Jersey, United States) 0 0 0 0 0 user votes
Yorktown (New Mexico, United States) 0 0 0 0 0 user votes
Yorktown (New York, United States) 0 0 0 0 0 user votes
Yorktown (North Carolina, United States) 0 0 0 0 0 user votes
Yorktown (Ohio, United States) 0 0 0 0 0 user votes
Yorktown (South Dakota, United States) 0 0 0 0 0 user votes
Yorktown (Tennessee, United States) 0 0 0 0 0 user votes
Yorktown (Texas, 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.