Statistics for occurrence #1 of “Petersburg, Va.” in chapter 6 of Thomas Wentworth Higginson, Massachusetts in the Army and Navy during the war of 1861-1865, vol. 1, Mass. officers and men who died.:

...s. Inf.,Antietam, Md.,Sept. 17, 1862. Benroy, Thomas,57th Mass. Inf.,Wilderness, Va.,May 6, 1864. Benson, William R.,1st Mass. Inf.,Williamsburg, Va.,May 5, 1862. Bentley, George W.,22d Mass. Inf., Petersburg, Va. ,June 18, 1864.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Petersburg, Va. (Virginia, United States) 3,884 834 1,976 834 0 user votes
Petersburg, Va. (West Virginia, United States) 13 0 13 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.