In 1943, the battles on the Soviet-German front were the most brutal. The German command sought to regain the strategic initiative. The Battle of Kursk was to solve this problem. Carrying out the tasks of the Supreme Command Headquarters, Soviet military intelligence conducted hundreds of secret operations, trying to promptly reveal the plans of Hitler and his generals. Some of the operations of military intelligence officers are described in this book. Some of them ended tragically. Others created the necessary conditions for the defeat of the elite German troops on the Kursk Bulge, while others helped I.V. Stalin win difficult diplomatic negotiations with F. Roosevelt and W. Churchill, which took place in Tehran and had a major impact on the further course of World War II.