Statistics for occurrence #1 of “Petersburg, Va.” in entry erie-lake-battle-on of Harper's Encyclopedia of United States History:

... weighed anchor and sailed into Put-in-Bay, not far from Sandusky, out of which the American fleet had sailed that morning. The last survivor of the battle of Lake Erie was John Norris, who died at Petersburg, Va. , in January, 1879.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Petersburg, Va. (Virginia, United States) 3,884 74 1,976 20 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.