This text studies Great Britain's economic blockade of Germany in World War I, one of the key elements to the victory of the Entente. 'A thorough account of the British aims, execution, and evaluation of the blockade effort. It will certainly serve as a starting point for future efforts to evaluaate the effectiveness of the blockade.' - Jari Eloranta, Appalachian State University, USA 'The author argues - convincingly I believe - that blockade had become the single most effective weapon in Allied hands during the Great War.' - Stand To! (Journal of the Western Front Association)