The United States Naval Academy (also known as USNA, Annapolis, or Navy) is a four-year coeducational federal service academy in Annapolis, Maryland. Secretary of the Navy George Bancroft began it in 1845. It is the second-oldest of the United States' five service academies. It educates officers mostly to join the United States Navy and Marine Corps. The campus is on the former grounds of Fort Severn where the Severn River flows into Chesapeake Bay. It is about east of Washington, D.C. and southeast of Baltimore, Maryland. The entire campus is a National Historic Landmark. The campus has many historic sites, buildings, and monuments. One monument is the Herndon Monument, once a year the upper three classes add grease and challenge the freshmen to reach the tip (usually unsuccessfully).