Knights Without Parachutes — tanks

Tanks, like airplanes, came into their own in WWII, but WWI was the first experiment with them. Tanks and airplanes of WWI looked more like something someone threw together in their garage, than like the WWII weapons.  Today is Tank Day, that is, the 100th anniversary of the first use of tanks in warfare, when the British Mark I tanks took the field. Their first use wasn't that impressive, but the Germans immediately caught on to the possibilities, and not only copied the idea, but soon painted the Iron Cross on captured tanks and sent them right back into battle.  Germany did come up...