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With the outbreak of war in 1861 he was elected Colonel commanding the 2nd Maine Volunteer Infantry Regiment , the first Maine unit to leave the state for the front .
 2nd Maine Volunteer Infantry Regiment, Maine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 2nd Maine Volunteer Infantry Regiment, Maine