The Sound of Music endeared Georg von Trapp (1880-1947) and his singing family to the world, and it also showed us how desperately the Nazis wanted Captain von Trapp for their navy. In To the Last Salute we learn why. Trapp's own story of his exploits as a submarine commander during the First World War is as exciting as it is instructive, bringing to stirring life a little-known chapter in the naval history of that war. In his many guises Trapp describes...