Statistics for occurrence #1 of “Chicago, Ill.” in entry army of Harper's Encyclopedia of United States History:

...eadquarters, Governor's Island, N. Y. Commander, Maj.-Gen. John R. Brooke. Department of the Lakes.--States of Wisconsin, Michigan, Illinois, Indiana, Ohio, Kentucky, and Tennessee; headquarters, Chicago, Ill. Commander, Maj.-Gen. Elwell S. Otis. Department of the Missouri.--States of Iowa, Nebraska, Missouri, Kansas, and Arkansas, the Indian Territory, and the Territory of Oklahoma; headquarters, Omah...
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