During the Second World War, the development of heavy tanks continued at a fevered pitch. To deploy these tanks to the front line, or retrieve them when damaged or broken, the necessity of a large-scale transport vehicle was heightened. In April of 1943, the U.S. started production of "The Dragon Wagon", one of the biggest tank transport vehicles of WWII. Constructed around an armoured cabin and a sturdy trailer, it boasted a loading capacity of 40 tons. Also assisting in the transport of boats for river crossing operations, the Dragon Wagon was a great advantage to the advancement of the Allied Forces.