Many books have already been written about the 1937 military conspiracy, and now there is no doubt that it was in reality. However, did Stalin manage to clear the army of all traitors and conspirators in 1937-1938? The author of this study is confident that no. Why, he asks, did we have such a hard time in the initial period of the war? What kind of strange reshuffle of personnel took place in the Moscow Military District on the day of Germany's attack on our country? The reader will find answers to these and many other questions in the book presented to his attention. The author's position is confirmed by documentary materials.