KV-1 (1941) is a Soviet heavy tank that was developed in 1939 and introduced in 1940. It was named after Kliment Voroshilov, a Soviet politician and military officer, who was also the People's Commissar for Defense during the late 1930s.The KV-1 was designed to be heavily armored and heavily armed, making it an effective tank on the battlefield. Its armor was thick enough to resist most anti-tank weapons of its time, and its 76.2mm gun was powerful enough to take out other tanks and fortified positions.The KV-1 was used extensively by the Soviet Union during World War II, and it was highly respected by both Soviet and German soldiers for its durability and firepower. It played a significant role in the defense of Moscow in 1941 and was also used in the Battle of Stalingrad.Later variants of the KV-1 were developed, including the KV-1S and the KV-85, which featured improvements in speed, mobility, and firepower.