Comprising a pair of 10-foot wheels connected by a drum axle packed with 2 tons of TNT, the rocket-propelled Great Panjandrum was intended to launch from landing craft and blast holes into German shore defenses — in theory, anyway. (Conceptual illustration by Wilf Hardy/©Look and Learn/The Bridgeman Art Library)
Conceptual illustration by Wilf Hardy/©Look and Learn/The Bridgeman Art Library