T-37A tank

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T-37А amphibious scout tank
T-37А, displayed in Kubinka Tank Museum
Type	Amphibious light tank
Place of origin	Soviet Union
Service history
In service	From 1933
Used by	Soviet Union  Finland (captured)  Romania (captured)  Nazi Germany (captured)  Hungary (captured)
Production history
Designer	N. Kozyrev, Factory No. 37, Moscow
Designed	1931–33
Produced	1933–36
No. built	~1,200
Variants	T-37A (main production), T-37TU command tank, M1936
Specifications (T-37[1])
Mass	3.2 tonnes
Length	3.75 m (12 ft 4 in)
Width	2.10 m (6 ft 11 in)
Height	1.82 m (6 ft 0 in)
Crew	2
Armour	3–9 mm
Main armament	7.62mm DT machine gun (585 rounds)
Engine	GAZ-AA 40 hp (30 kW)
Power/weight	13 hp/tonne
Suspension	sprung bogie
Fuel capacity	100 litres
Operational range	185 km
Maximum speed	35 km/h (22 mph)

The T-37A was a Soviet amphibious light tank. The tank is often referred to as the T-37, although that designation was used by a different tank which never left the prototype stage. The T-37A was the first series of mass-produced fully amphibious tanks in the world.^[2]

The tank was first created in 1932, based on the British Vickers tankette and other operational amphibious tanks. The tank was mass-produced starting in 1933 up until 1936, when it was replaced with the more modern T-38, based on the T-37A. Overall, after four years of production, 2552 T-37As were produced, including the original prototypes.^[3]

In the Red Army, they were used to perform tasks in communication, reconnaissance, and as defense units on the march, as well as active infantry support on the battlefield. The T-37A was used in large numbers during the Soviet invasion of Poland and in the Winter War against Finland. T-37As were also used by the Soviets in the beginning of the Great Patriotic War, but most of them were quickly lost. Surviving tanks fought on the front lines until 1944, and were used in training and auxiliary defense until the end of World War II.^[4]