The Constellation a 36-gun ship was the second frigate built for the U.S. Navy was launched in 1797, But was the first of the US Navy's original six frigates to go to sea in June of 1798.   On Feb. 9, 1799, during the undeclared naval war with France (1798-1800), the ship, under the command of Thomas Truxtun, captured the 40-gun French frigate L'Insurgente. A year later the Constellation engaged another French frigate, the Vengeance. After being rebuilt, the Constellation was used against Confederate commerce raiders during the Civil War. The restored Constellation is moored in Baltimore's Inner Harbor.