Statistics for occurrence #1 of “Petersburg, Va.” in chapter 2 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:

...g Green, Covington, and Newport, Ky., and Cincinnati, Ohio. Plans of forts, batteries, etc., Petersburg, Va. Plans of forts, batteries, etc., Mobile, Ala. Field-works and lines, Petersburg, Va. Rappahannock Station, Va., March 29, 1862. Northern Alabama and Middle Tennessee Campaign, November 14, 1864-January 23, 1865. Campaign of the Carolinas, January 1-April 26, 1865. ...
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.