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Most mistaken decision of the war

LAURENCE REES: And the single most mistaken decision of the war?

ROBERT SERVICE: The single most mistaken decision of the war? That’s a very easy one. Stalin had so much reposed his hopes in his judgement that Hitler wouldn’t be senseless, that he failed even to allow his Red Army to retaliate against an invasion in June 1941. The single greatest mistake was his own senselessness in thinking that Hitler wouldn’t be senseless in invading the Soviet Union in June 1941.