The practice of burying tanks survived even after World War II. Nearly 100 Panzer IV tanks that had been gifted to Bulgaria ...

However, the Panzer IV's 7.5 cm KwK L/48 could penetrate this ... and the Panther—two of the most dangerous Axis tanks in World War II. Their guns could penetrate 179 mm of armor at 1,000 ...

is suing the Collings Foundation over a rare Panzer IV, a vintage tank that Allen says he paid $2.5 million for in July. The tank was built in 1944 and used by the German army in World War II.