The United States Naval Academy is an academy for training commissioned officers.
United States Naval Academy . Established on 10 October 1845 , under Secretary of the Navy George Bancroft , it is the second oldest of the United States ' five service academies , and educates officers for commissioning primarily into the United States Navy and United States Marine Corps . Graduates are usually commissioned as ensigns in the Navy or second lieutenants in the Marine Corps , but a small number can also be cross-commissioned as officers in other U.S. services , and the services of allied nations .