Battleship USS Missouri | Book Oahu Tours, Activities & Things to Do with HawaiiActivities.comThe Battleship USS Missouri at Pearl Harbor, or “Mighty Mo, is where visitors can walk across the Surrender Deck which was the site where the treaty was signed ending WWII on September 2, 1945. Built in 1940, the USS Missouri was the last naval battleship constructed by the U.S. After such a rich history, the Mighty Mo was decommissioned and since 1998 has served as a memorial and preservation site honoring the men who gave their lives to World War II.