Statistics for occurrence #1 of “Pittsburgh” in chapter 5, page 117 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 4, 15th edition.:

... Pittsburgh
But as soon as spring opened the Western rivers, and before Washington could reach Will's Creek, the French, led by Contrecoeu...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Pittsburgh (Pennsylvania, United States) 1,610 38 144 0 0 user votes
Pittsburgh (Nevada, United States) 0 0 0 0 0 user votes
Pittsburgh (North Dakota, United States) 0 0 0 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.