Only seven U.S. submariners earned the Medal of Honor in World War II. Sam Dealey, the USS Harder's commander, was one of them. His honor was awarded posthumously after the entire crew was lost off Bataan during a depth-charge attack in August 1944 by a Japanese convoy. The Harder's fighting spirit is legendary, and its record of sinking a total of eighteen enemy ships (with a tonnage in excess of 55,000) made Dealey one of the top five submarine...