Algodoo

Developed in the early 30's, the B-4 Heavy Howitzer was widely used throughout the Great Patriotic War.
It saw service during the Moscow counterattack, the Stalingrad offensive, the Crimean liberation and in almost every severe street fighting.
With a combat weight of 17,700 kilogram the B-4 Howitzer could launch a 100 kilogram HE projectile over a distance of 11 miles.
A crane attached to the side alleviated the loading process.
During longer movements, usually accomplished by tractors, the barrel was dismounted and transported on a special wagon.