154866
Service The 3rd Maryland Infantry , Potomac Home Brigade was organized at Cumberland , Hagerstown , and Baltimore , Maryland beginning October 31 , 1861 and mustered in on May 20 , 1862 for three years under the command of Colonel Henry C. Rizer .
 3rd Maryland, Potomac Home Brigade, Cumberland, Hagerstown, Baltimore , Maryland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 3rd Maryland, Potomac Home Brigade, Cumberland, Hagerstown, Baltimore , Maryland