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
During the war, German tank design went through at least three generations, plus constant minor variations. The first generation included such prewar vehicles as the Panzerkampfwagen (or Panzer) I and II, which were similar to Soviet and British light tanks. The Germans converted their tank battalions to a majority of Panzer III and Panzer IV medium tanks after the 1940 French campaign. However, the appearance of large numbers of the new generation T-34 and KV-1 Soviet tanks, that were unknown to Germans until 1941, compelled them to join a race for superior armour and gun power. The third generation included many different variants, but the most important designs were the Panther (Panzer V) and Tiger (Panzer VI) tanks. Unfortunately for the Germans, lack of resources combined with emphasis on protection and firepower and a penchant for overly complex design philosophies in nearly every part of an armoured fighting vehicle's design compromised the production numbers. However, an assault gun casemate-hulled development of the Panzer III, the Sturmgeschütz III, would turn out to be Germany's most-produced armoured fighting vehicle of any type during the war, at just over 9,300 examples, a popular design which could also be very effectively tasked to perform the duties of a dedicated anti-tank vehicle.