Birth of a tank -- The Detroit Tank Arsenal

here the claws of Steel uncoiled the Caterpillar Track rubber Treads vulcanized on steel plates the development of the caterpillar trck is one of the essential mechanical advances that made the modern tank possible it lies open on the assembly floor waiting to draw on the huge body it will supply sufficient traction to enable the machine to operate over the roughest Terrain the Giant's legs the bogy wheels alignment on the final assembly line is maintained by letting these wheels run in a Groove crack on the floor of the shop the wheels run onto the Treads a machine full grown at last ready to roll off the front of the line under its own power ready to pull the next tank into place without a moment's pause