Russia produced a staggering 84,000 T-34 tanks during World War II. Such was the pace of production, that tanks in Stalingrad were even rolled directly off the factory line straight into battle.

During World War II, the British called their minesweeping tank a Crab: it was a U.S-made M4 Sherman tank equipped with flails – long chains attached to a revolving drum that beat the ground to ...