This is the first book from the new five-volume project “The West against Russia” by the famous historian Arsen Martirosyan. For the first time in Russian history, readers are presented with a fundamentally new look at the tragic events of 1937 - the exposure of the conspiracy of high-ranking Soviet military leaders led by Marshal Tukhachevsky. Using a unique technique widely used in Stalin’s personal intelligence, the author reveals the vile role of the British intelligence services in exposing this conspiracy, when the ruling circles of the West converted its consequences into the Munich Agreement of 1938 with Hitler and unleashed the Second World War. Using broad historical material, the book shows for the first time the powerful world-class behind-the-scenes games, the names and real actions of employees and agents of Soviet and British intelligence are revealed. The anti-Russian policy of England, which has centuries-old roots, is especially carefully analyzed. Unique data from the history of geopolitics, the activities of intelligence services, secret diplomacy and secret financing of the most important political processes of the first half of the twentieth century are presented in the new book by Arsen Martirosyan with the utmost thoroughness and depth.