In 1942, Seaman Calvin Graham was decorated for valor in battle. Then his mother learned where he'd been and revealed his secret to the Navy. With powerful engines, extensive firepower and heavy armor, the newly christened battleship USS South Dakota steamed out of Philadelphia in August of 1942 spoiling for a fight. The crew was made up of “green boys”—new recruits who enlisted after the Japanese bombing of Pearl Harbor—who had no qualms about either their destination or the action they were likely to see. Brash and confident, the crew couldn’t get through the Panama Canal fast enough, and their...