Statistics for occurrence #1 of “Petersburg, Va.” in chapter 98 of Thomas Wentworth Higginson, Massachusetts in the Army and Navy during the war of 1861-1865, vol. 1, Mass. officers and men who died.:

...r, Va.,Sept. 19, 1864. Tillson, Albert A., 1st Lieut.,7th Mass. Inf.,Marye's Heights, Va.,May 3, 1863. Tindley, William,1st Mass. H. A.,Spotsylvania, Va.,May 19, 1864. Tirrell, John,32d 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.