Tanker's Tuesday: Centurion Main Battle Tank

The development of the Centurion Main Battle Tank began in 1943
when the British Army asked for a new cruiser tank equipped with
at least a 17-pounder gun. They wanted a fast tank that, even though
heavily armored, would perform well in cross-country travel.
Prototypes of the new tank, known as the A-41, were built and sent
to Germany in 1945, but the war ended before they saw combat

http://science.howstuffworks.com/centurion-main-battle-tank.htm