In the middle of 1930s the tank design bureau of the engine production plant in Kharkov was in the process of scheming a new convertible tank. Simultaneously, while designing the ordered tank that was designated A-20, the engineers decided to build the tracked A-32. Its armour had bigger angling that made it better protected from enemy shells. A-32 had a 76,2-mm cannon installed and had a design that provided the possibility of strengthening the armour though the initial design didn’t allow doing it – both tanks were to be presented at the state testing having the same weight and Diesel engine. The testing of the tracked model - designated T-32 - were the most successful. K.E. Voroshilov confirmed that was the tank the Soviet Army needed but he offered to strengthen the T-33 armour thanks to the existing engine capacity reserve. So the armour was thickened up to 45-mm. That was how T-34 was built, the tank that made itself a good name even among the enemy forces.
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