After he graduated from the U.S. Naval Academy in 1947, Ted Davis' first assignment was aboard the aircraft carrier Antietam. As that tour was ending, his superiors tried to keep him in aviation. "Anybody who would fly on and off this thing is crazy," Davis declared. "I'm going to be a submariner, where it's peaceful and quiet." Davis got his wish, rising through the ranks to command the Grenadier, a Tench-class diesel sub. But things proved to be neither peaceful nor quiet. Fifty years ago this week, he and his 80-member crew made history, forcing a Soviet sub to the...