This Day in Naval History – May 20
1801 - Four warships sent to Mediterranean to protect American commerce
1815 - Commodore Stephen Decatur ( Frigate Guerriere) sails with 10 ships to suppress Mediterranean pirates' raids on U.S. shipping
1844 - USS Constitution sails from New York on round the world cruise
1943 - Establishment of Tenth Fleet in Washington, DC, under command of ADM King to coordinate U.S. antisubmarine operations in Atlantic
(Source: Navy News Service)