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Fort Bennett was originally called the Post at Cheyenne River Agency and was established during the Indian wars in the Department of Dakota by the U.S. Army to control the Sioux .
 Cheyenne River Agency, Department of Dakota, U.S. Army, Sioux
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cheyenne River Agency, Department of Dakota, U.S. Army, Sioux