New Zealand’s first tank (the Bob Semple tank) was built from a tractor, sheet metal and 6 machine guns. When ridiculed for the design Bob Semple said “I don’t see anyone else coming up with any better ideas.”
A tank designed by the Swiss military had a bug where turning on the heater could cause the main gun to fire.
During the German invasion of the Soviet Union, a single Russian tank delayed the advance of an entire division for one day.
During the Battle of Stalingrad, factories in the city continued to produce tanks. These tanks, unpainted and lacking gunsights, were driven directly from the factory floor to the front line and were often crewed by factory workers.
During WW2 in Africa, US tanks were outmatched by superior German tanks. So the US used Jeeps with machine guns to go behind enemy lines to destroy the fuel trucks supplying gas to the German tanks thereby disabling them.
Arnold Schwarzenegger bought the tank he drove during military service.
A British Challenger 2 tank was hit directly by 14 RPGs and an anti-tank missile in Iraq. The crew was uninjured and the tank was back in operation 6 hours later. Another survived 70 RPG hits. Only 1 Challenger 2 has been destroyed in combat; by another Challenger 2 in a friendly fire incident.
Slave laborers making tanks for Nazi Germany routinely sabotaged every part they could, and this caused German tanks to be extremely prone to breaking down.
Since 1945, all British tanks have come equipped with tea making facilities.
The Nazis planned to build a 1,500 ton super tank with a crew of over 100 men.