This article deals with the history and development of tanks of the Soviet Union and its successor state, the Russian Federation; from their first use after World War I, into the interwar period, during World War II, the Cold War and modern era.

Overview After World War I (1914-1918), many countries wanted 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, when the Soviet Union and Germany began to design and build their own tanks. The 1919 Treaty of Versailles had severely limited Germany's industrial output. Therefore, in order to circumvent Germany's treaty restrictions, German industrial firms formed a partnership with the Soviet Union to legally produce weapons and sell them, and along with other factors built up an infrastructure to produce tanks which later made the famous T-34 and other Soviet tanks.

Organisationally, Soviet land forces often included (OTBs: ) for tactical operations generally under the command of a podpolkovnik (lieutenant colonel).

History

General developments influencing Soviet tank design

Imperial Russia had flirted with some designs such as the Tsar Tank which was scrapped, and the Vezdekhod () which did not progress further than a pre-production model due to problems in the design.

The final tank designs in World War I showed a number of trends such as in the US and British produced Mark VIII tank for heavy tanks. However, the French Renault FT set the pattern for almost all tanks that followed it; these tanks generally had lower track profiles and more compact hulls, and mounted their weapons in turrets. Following the Great War, Britain continued its technical dominance of tank design, and British designs, particularly those from Vickers-Armstrong, formed the basis for many Soviet tank designs of the 1930s, including the T-26 and BT series. Designs such as the Vickers Medium Mk II brought to the forefront the fully rotating turret on top and dual-use 3-pounder gun (that could fire both high-explosive and anti-tank shells), while the Vickers Carden-Lloyd machine gun carriers influenced the tankette concept such as the Soviet T-27.

Another notable design that influenced the Soviets was the Vickers A1E1 Independent, a large multi-turreted heavy tank built in 1925. Its design influenced the Soviet T-35 heavy tank.

The Spanish Civil War showed that tank-versus-tank engagements and tank-versus-towed antitank gun engagements would now be a major consideration. It became clear that future tanks would need to be heavily armoured and carry larger guns.

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 armoured trains and artillery trains was common. This tended to lead to a greater interest in tanks and armoured 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. 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. Joseph 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 the U.S., J. Walter Christie had developed a series of fast tanks, based on his revolutionary Christie suspension system. This was combined with very high power-to-weight ratios achieved by fitting large aircraft engines in his tanks. Some of his prototypes were purchased by the Soviet Union, and were to be developed into the BT tanks and eventually, on the eve of World War II, the famous T-34. The BT series in turn influenced the British cruiser tank designs such as the A-13 Cruiser Mk IV, Crusader, and others.

The French pioneered manufacturing methods in the use of very large castings to form gun mantlets, turrets and eventually, entire tank hulls. The widespread use of casting turrets was copied by the USSR, and led the way in rationalizing designs for fast production, eliminating unnecessary components or manufacturing steps that added little value, which later was to be incorporated in the mass production of their tanks such as the T-34.

Russian Civil War

In Soviet Russia, the so-called armoured forces (броневые силы) preceded the Tank Corps. They consisted of the mechanized armoured units (автобронеотряды) made of armored vehicles and armored trains.

The country did not have its own tanks at the time, but their forces did come across the Mark V tanks. A number of the Mark V tanks saw service in the Allied intervention in the Russian Civil War on the White Russian side. Most were subsequently captured and used by the Red Army during the war. Three were reactivated in 1941 for use in the Battle of Stalingrad. In January 1918, the Red Army established the Soviet of Armored Units (Совет броневых частей, or Центробронь), later renamed to Central Armored Directorate and then once again to Chief Armored Directorate (Главное броневое управление).

During the war, the Nizhny Novgorod Machine Factory built armored trains, armoured carriages, and weapons for the vessels of the Volga Military Flotilla. In 1920, the factory remanufactured fourteen burnt-out French Renault FT tanks for the Red Army, the Russkiy Renos, and assembled a single new copy, named 'Freedom Fighter Lenin'.

Interwar period

Initially, the tanks and armoured cars in Soviet hands were a mix of captured Renault FTs and a few British tanks and British-built Austins left behind in the civil war. The first conventional Soviet tank, the T-18 (sometimes called MS-1), was a fairly close copy of the French Renault FT, but with improved suspension and a larger turret.

In 1926, under a secret annex to the Treaty of Rapallo, the Soviet Union and Germany set up a joint tank school at Kazan in the west of the Urals, 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. In 1928, the Soviet Union began the production of the MS-1 tanks (Малый Сопровождения -1, where M stands for "small" and S for "convoy"). In 1929, it established the Central Directorate for Mechanization and Motorization of the Workers’ and Peasants’ Red Army. Tanks became a part of the mechanized corps at this point. From 1929, an experimental Mechanised Brigade was formed, training and developing combined-arms tactics with foreign tanks, armoured cars, tractors, and lorries.

A tank design bureau was established at the Kharkov Locomotive Factory (KhPZ) in Kharkiv, Soviet Ukraine, in 1928. The first tank project of the factory was the T-12 (or T-1-12). This was a larger version of the T-18, with a more powerful engine. It seemed to have been done in parallel to the T-19 light tank which was also based on the FT. The project was re-designated T-24, work was completed fixing problems with the transmission and fuel system, and a larger turret was designed. Initial trials were conducted, during which performance was found satisfactory, although the prototype's engine caught fire, and the turret had to be transferred to a T-12 prototype for further testing. Only a total of twenty-four were built during 1931. The T-24s were originally armed only with machine guns, until the 45 mm guns were installed in the following year.

The T-24 was found unreliable, and was used only for training and parades. Although the T-24 tank was a failure, it gave the KhPZ its initial tank design and production experience, which was applied much more successfully in adopting production of modified U.S. Christie tanks as the BT tank series, starting in 1931.

Based on a mixed force of foreign tanks and imported prototypes, the Soviets developed a large 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. In spring 1930, the Soviet buying committee, under the direction of Semyon Ginzburg, had arrived in Great Britain to select tanks, tractors and cars to be used in the Red Army. The Vickers 6-ton was among four models of tanks selected by Soviet representatives during their visit to the Vickers-Armstrongs Company. According to the contract signed on 28 May 1930, the company delivered to the USSR 15 twin-turreted Vickers Mk.E (Type A, armed with two 7.71 mm water-cooled Vickers machine guns) tanks together with full technical documentation to enable series production of the tank in the USSR. The ability of the two turrets of the Type A to turn independently made it possible to fire to both the left and right at once, which was considered advantageous for breakthroughs of field entrenchments.Kolomiets (2007), pp. 6–9 Several Soviet engineers participated in assembly of the tanks at the Vickers Factory in 1930.Baryatinskiy (2003), p. 2

The Vickers-built 6-ton tanks had the designation V-26 in the USSR. Three British tanks were successfully tested for cross-country ability at the small proving ground near Moscow on Poklonnaya Hill in January 1931. One tank hull was tested for gunfire resistance in August 1931. Kliment Voroshilov ordered the creation of the "Special Commission for the Red Army (RKKA) new tanks" under the direction of S. Ginzburg to define the tank type suitable for the Red Army. The T-19 8-ton light infantry tank, developed by S. Ginzburg under that programme at the Bolshevik Factory in Leningrad was a theoretical competitor to the British Vickers 6-Ton. The first prototype of the complex and expensive T-19 was not finished until August 1931. Because both tanks had advantages and disadvantages, S. Ginzburg suggested developing a more powerful, hybrid tank (the so-called "improved" T-19) with the hull, home-developed engine and armament from the native T-19, and the transmission and chassis from the British Vickers 6-ton.Svirin (2007), pp. 162-172 On 13 February 1931, the Vickers 6-Ton light infantry tank, under the designator T-26, officially entered service in the Red Army as the "main tank for close support of combined arms units and tank units of High Command reserve".

More than 50 different modifications and experimental vehicles based on the chassis of the T-26 light infantry tank were developed in the USSR in the 1930s, with 23 modifications going into series production. The majority were armoured combat vehicles: flame tanks, artillery tractors, radio-controlled tanks (teletanks), military engineering vehicles, self-propelled guns and armoured personnel carriers. Flame-throwing tanks formed around 12% of the series production of T-26 light tanks.Baryatinskiy (2003), p. 22 The abbreviation "OT" (Ognemetniy Tank which stands for Flame-throwing Tank) appeared only in post-war literature; these tanks were originally called "KhT" (Khimicheskiy Tank which stands for Chemical Tank), or BKhM (Boevaya Khimicheskaya Mashina; Fighting Chemical Vehicle) in the documents of the 1930s. All chemical (flame-throwing) tanks based on the T-26 chassis (KhT-26, KhT-130, KhT-133) were designated BKhM-3. The vehicles were intended for area chemical contamination, smoke screens and for flame-throwing.