As both the Continental Army and the Virginia militia had an abundance of officers, Monroe did not serve during the Yorktown campaign, and, much to his frustration, did not take part in the Siege of Yorktown. Although Andrew Jackson served as a courier in a militia unit at age 13, Monroe is regarded as the last U.S. president who was a Revolutionary War veteran, since he served as an officer of the Continental Army and took part in combat. As a result of his service, Monroe became a member of the Society of the Cincinnati.