The Soviet cavalry tank BT-2

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The BT-2, also known as the "Christie Tank," was an armored fighting vehicle developed in the early 1930s by J. Walter Christie for the Soviet Union. Notably, it featured a torsion bar suspension system and a gasoline engine, making it faster and more maneuverable than previous tank models. Despite its innovative design, production issues and reliability concerns led to the BT-2 being phased out in favor of more reliable vehicles by the mid-1930s.