This compelling book explores Germany's campaign of unrestricted submarine warfare in World War I, which marked the onset of total war at sea. Noted historian Lawrence Sondhaus shows how the undersea campaign, intended as an antidote to Britain's more conventional blockade of German ports, ultimately brought the United States into the war. Although the German people readily embraced the argument that an "undersea blockade" of Britain enforced by their navy's Unterseeboote (U-boats) was the moral equivalent of the British navy's blockade of German ports, international opinion never accepted...