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.
Charles Martel-class ironclad Charles Martel and Brennus were two French ironclad battleships laid down in 1881–85, but cancelled in 1886, at an early stage of construction. They were slightly enlarged "Marceau"s, but with partial waterline belt armour. (The only large French armoured battleships completed in the 19th Century to have a partial armoured belt were the "Dévastation" class and the "Masséna".)