A new work by a popular historian, famous for his previous sensational books “June 22, or When did the Great Patriotic War begin?” and “On Peacefully Sleeping Airfields...” Continuation of historical bestsellers, which sold record copies comparable to those of Viktor Suvorov’s books. Large-scale and fascinating study of the tragic events of the summer of 1941. Drawing on a huge number of original documents of that time, comprehensively analyzing the history of military-technical training of the Soviet Union to the Great War and pre-war strategic planning, the author comes to a stunning conclusion - in June 1941, Hitler, without expecting it, was exactly one day ahead of Stalin's attack...