It was a good tank with decent armor and firepower capable of facing contemporary tanks like the German Panzer III and IV. However, the Germans continually made new tank models as the war dragged on.

According to the Los Angeles Times, Vulcan Warbirds, one of Allen's companies, is suing the Collings Foundation over a rare Panzer IV, a vintage tank that Allen says he paid $2.5 million for in July.