Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
History of the tank
Holt returned to Stockton and, utilising his knowledge and his company's metallurgical capabilities, he became the first to design and manufacture practical continuous tracks for use in tractors. In England, David Roberts of Hornsby & Sons, Grantham, obtained a patent for a design in July 1904. In the United States, Holt replaced the wheels on a Holt steamer, No. 77, with a set of wooden tracks bolted to chains. On November 24, 1904, he successfully tested the updated machine ploughing the soggy delta land of Roberts Island.
When World War I broke out, with the problem of trench warfare and the difficulty of transporting supplies to the front, the pulling power of crawling-type tractors drew the attention of the military. Holt tractors were used to replace horses to haul artillery and other supplies. The Royal Army Service Corps also used them to haul long trains of freight wagons over the unimproved dirt tracks behind the front. Holt tractors were, ultimately, the inspiration for the development of the British and French tanks. By 1916, about 1,000 of Holt's Caterpillar tractors were used by the British in World War I. Speaking to the press, in claiming the British tanks in use in 1916 were Holt-built, Holt vice president Murray M. Baker said that these tractors weighed about and had . By the end of the war, 10,000 Holt vehicles had been used in the Allied war effort.