 Complete the following phrase:  At the beginning of the Revolutionary War, Phelps joined the Continental Army and fought in the Battle of Lexington. He left the service in 1777 and, relying on his experience as a merchant, became Massachusetts Superintendent of Purchases of Army Supplies, a Deputy Commissary of the Continental Army. He was introduced to Robert Morris, the great ficier of Revolutionary times. He supplied troops and received commendation from General George Washington for his efforts. He was a member of the Massachusetts House of Representatives from 1778 to 1780 and a member of the 