Statistics for occurrence #1 of “Chicago” in chapter 5 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 3, 15th edition.:

...ree other great avenues from the St. Lawrence to the Mississippi; for the safe possession of the route by way of the Fox and Wisconsin, they had no opponents but in the Sacs and Foxes; that by way of Chicago had been safely pursued since the days of Marquette; and a report on Indian affairs, written by Logan, in 1718, proves that they very early made use of the Miami of the Lakes, where, after crossing ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Chicago (Illinois, United States) 3,613 16 281 0 0 user votes
Chicago (Wisconsin, 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.