DESCRIPTION:
Landkreuzer P. 1000 Ratte
The Landkreuzer P. 1000 Ratte (lit.: Land Cruiser P. 1000 "Rat") was a design for a huge tank for use by Nazi Germany during World War II. It was designed in 1942 by Krupp with the approval of Adolf Hitler, but the project was canceled by Albert Speer in early 1943 and no tank was ever completed. At 1,000 metric tons, the P-1000 would have been over five times as heavy as the Panzer VIII Maus, the second largest tank ever built.
History

The development history of the Ratte originated with a 1941 strategic study of Soviet heavy tanks conducted by Krupp, the study also giving birth to the Panzer VIII Maus super-heavy tank. The study led to a suggestion from Krupp director Grote, special officer for submarine construction, who on June 23, 1942 proposed to Hitler a 1,000-tonne tank which he named a Landkreuzer. It was to be armed with naval artillery and armored with 9 inches (23 cm) of hardened steel, so heavily that only similar weapons could hope to affect it. To compensate for its immense weight, the Ratte would have been equipped with three 1.2 metre (3.9 ft) wide treads on each side with a total tread width of 7.2 metres (24 ft). This would help stability and weight distribution, but the vehicle's sheer mass would have destroyed roads and rendered bridge crossings completely impractical. However, it was anticipated that its height, and its ground clearance of 2 metres (6.6 ft) would have allowed it to ford most rivers with ease.
Hitler became enamored with Grote's concept and ordered Krupp to begin development on it in 1942. As of December 29, 1942 a few preliminary drawings had been completed, by which time the concept had been named Ratte (Rat). Albert Speer canceled the project in 1943 before any were actually constructed.