Statistics for occurrence #1 of “Sioux Indian” in entry wars-of-the-united-states of Harper's Encyclopedia of United States History:

...July 4, 1848 Apache, Navajo, and Utah.18491855 Comanche Indian18541854 Seminole Indian18561858 The Civil, or RebellionApril 21, 1861May 11, 1865 Sioux Indian18621862 Modoc Indian1872June, 1873 Sioux Indian June 25, 18761876 Nez Perce Indian1877October, 1877 Ute Indian18791879 With SpainApril 21, 1898Aug. 12, 1898
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Sioux Indian 6 6 0 0 0 user votes
Sioux Indians 174 64 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.