Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
Main battle tank
The second half of World War II saw an increased reliance on general-purpose medium tanks, which became the bulk of the tank combat forces. Generally, these designs massed about 25-30 tonnes, were armed with cannons around 75 mm, and powered by engines in the 400 to 500 hp range. Notable examples include the Soviet T-34 (the most-produced tank to that time) and the US M4 Sherman.