Winston Churchill admitted after the war that German submarines were the only reason that made him fear that Britain might lose the war to Germany. Had this happened, the Allies would have lost Britain as a base from which to conduct operations against the Third Reich, and an invasion of German-occupied Europe may never have taken place. The book of G. Williamson tells about the history, organization, equipment and uniform of crew members of German submarines in the First and Second World Wars. The text is accompanied by unique photographs and beautifully executed color illustrations based on archival materials.