Diana Preston: A Higher Form of Killing: Six Weeks in World War I That Forever Changed the Nature of Warfare [2015] hardback Condition:New You don't have to have

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Diana Preston: A Higher Form of Killing: Six Weeks in World War I That Forever Changed the Nature of Warfare [2015] hardback Condition:New You don't have to haveBetween April 22 and May 30, 1915, Western civilization was shocked. World War I was already appalling in its brutality, but it had until then been fought on the battlefield and by rules long agreed by convention. Suddenly those rules were abandoned when Germany forever altered the way war would be fought. On April 22, at Ypres, German canisters spewed poison gas at French and Canadian soldiers in their trenches; on May 7, the German submarine, U 20,