Marshal M.N. Tukhachevsky, shot on charges of high treason in 1937, was rehabilitated by Khrushchev in 1957 as "falsely accused," which added confusion to the question of purging the leadership of the Red Army on the eve of the war. The materials of the archives collected by German Smirnov clarify on the basis of which the "military case" was opened, did Tukhachevsky's conspiracy really exist? The value of this book is that it not only provides extensive information on the "military case," but the reader himself can participate in the historical investigation in order to form his own opinion about the 1937 army conspiracy.