" Austrian U-boat commander named Georg von Trapp, later to gain eternal renown when played by Christopher Plummer in the film The Sound of Music, fired two torpedoes into a large French cruiser, the Leon Gambetta. The ship sank in nine minutes, killing 684 sailors. “So that’s what war looks like!” von Trapp wrote in a later memoir. He told his chief officer, “We are like highway men, sneaking up on an unsuspecting ship in such a cowardly fashion. "

― Erik Larson , Dead Wake: The Last Crossing of the Lusitania