Statistics for occurrence #1 of “Missouri” in entry army of Harper's Encyclopedia of United States History:

.... 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, Omaha, Neb. Commander, Brig.-Gen. Fitzhugh Lee. Department of Texas....
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Missouri (Missouri, United States) 15,687 836 1 0 0 user votes
Missouri (United States) 560 116 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.