Who canceled the project for the Landkreuzer P. 1000 Ratte, which would have surpassed the Panzer VIII Maus as being the heaviest fully enclosed armoured fighting vehicle ever built?
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 the advancing Soviet forces.
Raketenjagdpanzer 1 The Raketenjagdpanzer 1 is an anti-tank guided missile-armed tank destroyer (the first such vehicle in service with the West German Armed Forces) that entered service in 1961. It was built on the chassis of the Hispano-Suiza HS-30, which was also used on the Schützenpanzer SPz 12-3, and armed with twin French SS.11 antitank guided missile launchers. Only one of the missile launchers is visible from the outside at any time, however, as the other is retracted into the hull to be reloaded when the first is ready to fire.