The purpose of this very valuable addition to the literature on the outbreak of the Second World War in September 1939 is straightforward. Roger Moorhouse insists that too little attention has been paid in the West to the heroic resistance of the Poles to German aggression. They were, indeed, the first nation to stand up to Hitler’s appetite for empire and they paid a grim price for that decision. By the end of the war close to six million Poles, half of them Polish Jews, had perished.