Statistics for occurrence #1 of “Petersburg, Va.” in chapter 3 of Capt. Calvin D. Cowles , 23d U. S. Infantry, Major George B. Davis , U. S. Army, Leslie J. Perry, Joseph W. Kirkley, The Official Military Atlas of the Civil War:

... Petersburg, Va.
1, 2 1, 2 Fort Moultrie, S. C. 1, 121, 122 5 121, 122 1, 2 61 ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Petersburg, Va. (Virginia, United States) 3,884 37 1,976 37 0 user votes
Petersburg, Va. (West Virginia, United States) 13 1 13 1 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.