In detailing the clash of political philosophies that drove the war's savage engine, Davies also examines how factors as diverse as technology, economics, and morale played dynamic roles in shaping battles, along with the unsung yet vital help of Poland, Greece, and the Ukraine (which suffered the highest number of casualties). And while the Allies resorted to bombing enemy civilians to sow terror, the most damning condemnation is saved for the Soviet Union, whose glossed-over war crimes against British soldiers and its own people prove that Communism and Nazism were two sides of the same brutal coin.