sentences:  On July 22, 1861, the United States Congress authorized a volunteer army of 500,000 men.When in August the enlistment term for the regiment ended a new 1st Regiment was raised for a term of three years at Wilmington, Delaware, between September 10 and October 19, 1861.This time the regiment had 37 officers and 846 enlisted men under the command of Colonel John W. Andrews.