Marshal Tukhachevsky and the "Deep Battle"

An Analysis of Operational Level Soviet Tank and Mechanized Doctrine, 1935-1945, by Peter J. Vlakancic. "Gluboky boi (Глубокий бой). Those two words vividly describe the doctrinal concept of Marshal of the Soviet Union Mikhail N. Tukhachevsky. In English we would call it 'deep battle.' Although promulgated by the marshal and his students throughout the Red Army in the early 1930s, it was not to survive Stalin's purges. Nor was the marshal. The death of Tukhachevsky, along with hundreds of junior commanders who might have put the doctrine into practice, heralded a period of intellectual stagnation and the disastrous performance of the Red Army in the opening battles of the Great Patriotic War."