Over 20 graduates of the United States Naval Academy (USNA) have served as members of the United States Congress as legislators in the United States Senate or United States House of Representatives or in their home nation. The Naval Academy is an undergraduate college in Annapolis, Maryland with the mission of educating and commissioning officers for the Navy and Marine Corps. The Academy is often is referred to as Annapolis, while sports media refer to the Academy as "Navy" and the students as "Midshipmen"; this usage is officially endorsed. During the latter half of the 19th century and the first decades of the 20th, the United States Naval Academy was the primary source of U.S. Navy and Marine Corps officers, with the Class of 1881 being the first to provide officers to the Marine Corps