On June 15, 1942, a massive fireball erupted from a convoy of oil tankers steaming into Chesapeake Bay. By the next day, three ships lay at the bottom of the channel, victims of Lieutenant-Commander Horst Degen and his crew on the German submarine U-701. Here acclaimed military reporter Ed Offley presents a thrilling account of Degen’s rampage along the American coast and of US Lieutenant Harry J. Kane’s quest to bring him down. When Kane and his crew spotted the silhouette of U-701 offshore that summer, the ensuing clash signaled a critical turning point in the Battle of the Atlantic—and the beginning of an unlikely friendship.