When the Germans began their final great drive, it was rumored that they had built some monster tanks that were far more formidable than anything the Allies had produced. Unlike the British, they used the tanks not to lead the army but to follow and destroy small nests of French and British that were left behind. When the French finally did capture one of the German tanks, which had fallen into a quarry, it proved to be a poor imitation. It was an ugly-looking affair, very heavy and cumbersome. Owing to the scarcity of materials for producing high-grade armor, it had to make up in thickness of plating what it lacked in quality of steel. The tank was intended to carry a crew of eighteen men and it fairly bristled with guns, but it could not manoeuver as well as the British tank; for when some weeks later a fleet of German tanks encountered a fleet of heavy British tanks, the Hun machines were completely routed. [Illustration: Courtesy of "Automotive Industries" Section through our Mark VIII Tank showing the layout of the interior with the locations of the most important parts in the fighting compartment in the engine room] It was then that the British sprang another surprise upon the Germans. After the big fellows had done their work, a lot of baby tanks appeared on the scene and chased the German infantry. These little tanks could travel at a speed of twelve miles an hour, which is about as fast as an ordinary man can run. "Whippets," the British called them, because they were like the speedy little dogs of that name. They carried but two men, one to guide the tank and the other to operate the machine-gun. The French, too, built a light "mosquito" tank, which was even smaller than the British tank, and fully as fast. It was with these machines, which could dart about quickly on the battle-field and dodge the shell of the field-guns, and which were immune to the fire of the machine-gun, that the Allies were able to make progress against the Germans. When the Germans retired, they left behind them nests of machine-guns to cover the withdrawal of their armies. These gunners were ordered to fight to the very end. They looked for no mercy and expected no help. Had it not been for the light tanks, it would have been well nigh impossible to overcome these determined bodies of men without frightful losses.