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The 1st Brigade Combat Team , 10th Mountain Division Special Troops Battalion is a special troops battalion of the United States Army headquartered at Fort Drum , New York .
 1st Brigade Combat Team, 10th Mountain, Special Troops, United States Army
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 1st Brigade Combat Team, 10th Mountain, Special Troops, United States Army