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Service The 15th Missouri Infantry was organized at St. Louis , Missouri August-September 1861 and mustered in for three years on under the command of Colonel Francis J. Joliat .
 15th Missouri Infantry, St. Louis , Missouri
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 15th Missouri Infantry, St. Louis , Missouri