page_title: Tanks of the interwar period
section_title: Soviet Union
hierarchical_section_title: Tanks of the interwar period / Soviet Union
caption_attribution_description: English: A T-35 heavy tank.
context_page_description: World War I established the validity of the tank concept and between the two world wars, many nations needed to have tanks, but only a few had the industrial resources to design and build them. During and after World War I, Britain and France were the intellectual leaders in tank design, with other countries generally following and adopting their designs. This early lead would be gradually lost during the course of the 1930s to the Soviet Union and, to a lesser extent, Nazi Germany.
context_section_description: The Soviet Union's efforts in tank design and production must be understood in the context of the experience of the Russian Civil War and the growth of Soviet industry. During the civil war, the use of armored trains and artillery trains was common. This tended to lead to a greater interest in tanks and armored cars compared to some western nations. The rapid growth of heavy industry in the USSR under the Five-Year plans made a large tank fleet possible.
  Initially, the tanks and armored cars in Soviet hands were a mix of FT-17 imports and a few British tanks left behind in the civil war. The first Soviet tank, the T-18 (sometimes called MS-1) was a fairly close copy of the FT-17, but with improved suspension and a larger turret. Stalin's enthusiasm for industrialisation and mechanisation drove an aggressive military development program, resulting in by far the largest and broadest tank inventory of all nations by the late 1930s.
  In 1926, under a secret annex to the Treaty of Rapallo, the Soviet Union and Germany set up a joint tank school at Kazan, which was illegal under the Treaty of Versailles. Both countries learned much about tank design and tactics in this co-operative venture. The Germans provided advice on mechanisation of Soviet heavy industry, and helped develop a sense of professionalism in the Red Army.  From 1929, an experimental Mechanised Brigade was formed, training and developing combined-arms tactics with foreign tanks, armoured cars, tractors, and lorries.
  The Soviets also spent tens of millions of dollars on U.S. equipment and technology to modernise dozens of automotive and tractor factories, which would later produce tanks and armoured vehicles.
  Based on a mixed force of foreign tanks and imported prototypes, the Soviets developed an impressive domestic design and production capability. The T-26 light tank was based on the Vickers E (as were many other tanks of the period), chosen after it beat a Soviet FT derivative in trials. The Soviets purchased some U.S. Christie M1930 tank prototypes, from which they developed the BT series of fast tanks. They also developed the heavier multi-turreted T-28 medium tank and the massive T-35, which followed the design premise of the Vickers A1E1 Independent. Of the tanks produced between 1930 and 1940, 97% were either identical copies of foreign designs, or very closely related improvements. Significantly, the major improvement the Soviet designers made to these foreign designs was an increase in firepower.  By 1935, the Red Army ". . . possessed more armoured vehicles, and more tank units than the rest of the world combined." (Zaloga 1984, p. 107)
  But from 1937 to 1941, the Red Army's officer corps, the armour design bureaux, and leadership of the factories were gutted by Stalin's Great Purge. Approximately 54,000 officers were repressed. Military knowledge completely stagnated and armoured vehicle production dropped drastically (though still remaining the world's largest). Training and readiness dropped to very low levels. This repression continued until the eve of the war.
  The participation by Soviet 'volunteer' tank units in the Spanish Civil War was decisive in forming Soviet tank designs for World War II. Soviet tanks dominated their foreign rivals in Spain due to their firepower, but their thin armor, in common with most tanks of the period, made them vulnerable to the new towed antitank guns being supplied to Infantry units. This finding led directly to a new generation of Soviet tanks. By the eve of World War II, the Soviet Union had some of the world's best tanks (including the T-34 and KV-1, which were basically a generation ahead, coming as a shock to the Wehrmacht). However, the poor training and readiness status of most Red Army units led to a catastrophic defeat of the enormous Soviet Mechanised Corps during the opening phases of Operation Barbarossa, Germany's 1941 invasion of the Soviet Union. Despite their generally good equipment, the Red Army's operational capabilities and motorised logistic support were very inferior.
caption: Soviet T-35 tank
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