The KV-1 was a Soviet heavy tank used during World War II, first introduced in 1939. It was designed to provide strong armor protection and firepower, featuring a 76.2 mm gun. The tank's robust construction made it effective against early German armor, and it played a significant role in various battles on the Eastern Front. Weighing around 42 tons, the KV-1 was powered by a V-2 diesel engine, allowing it to reach speeds of up to 30 km/h. Its design influenced later Soviet tanks, including the KV-2, which had a larger turret and a more powerful gun, enhancing its combat capabilities.