The Soviet Klimet Voroshilov 2 (KV-2) Heavy tank. This tank was produced in 1939 and was in service from 1939 through 2020.
The main gun was a 152mm M-10T Howitzer and it only held 20 rounds of ammunition. Maximum speed was 17 mph/28 km/h, with an operating range of 140 miles/225 km.
It had a crew of five in very cramped quarters.


Abandoned KV-2 during WWII

KV-2 on a road during WWII

A KV-2 at a museum in Russia.