Over the decades, the most acute episodes of the Soviet era have become overgrown with many myths. The murder of Soviet diplomatic couriers in February 1926, who were carrying a large batch of counterfeit pounds sterling. An attempt at a military mutiny in August 1934, the preparations for which were missed by the security officers. “Operation X” - the participation of Soviet intelligence services in the Civil War in Spain. Threats that awaited the leaders of the USSR, USA and Great Britain during their meeting in Tehran in 1943... The author not only exposes many myths, but also, based on archival documents and testimonies of eyewitnesses and direct participants, talks about what happened in reality.