Designed around the largest anti-fortress campaign gun available, the Chevalier was conceived to take fortifications head-on. It was named Chevalier after the massive, shield-like mantlet and the gun, said by the designer to resemble a jousting knight.
By Interwar standards, it was huge: 36 tons and 80mm of frontal armour, with 100mm of armour on the shield, as the mantlet was known.
The massive gun meant it could not go in a turret - so a towering superstucture was built instead, and the large mantlet designed to provide maximum protection.
Power came from a 37.5L V10 engine - delivering 613hp, allowing the very heavy machine to reach 46Km/h if lucky and going downhill.
The gun was a 95 x 700mm - Capable of penetrating 127mm of steel armour. It was 3.9m long and weighed over 700kg.