query: What was the largest tank in history?
passage: 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.
passage: British heavy tanks of World War I
A single male survives. This is the only surviving Mark I and the world's oldest surviving combat tank. It is part of the collection at the Bovington Tank Museum. It is painted to represent Number 705, C19, "Clan Leslie" although its identity and wartime history are unknown. There are indications that it may have served as a driver-training tank and it has been suggested it is Number 702, which would make it the second Mark I built. Between 1919 and 1970, it was sited in the grounds of Hatfield House to commemorate the fact this was a testing site for tanks during their earliest development.