Statistics for occurrence #1 of “Indian Territory” in entry united-states-of-america-indian-territory of Harper's Encyclopedia of United States History:

... Indian Territory
A division of the United States definitely set apart for the Indians, June 30, 1834, lat. 33° 35′ to 37° N., long...
Max. Freq. Min. Freq.
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† 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.