What does DUKW stand for? When was the first tank battle? Why are tanks called tanks? Why did they have MALE and FEMALE tanks in the First World War? Why do the names of British tanks all start with a C? Who invented the tank? Which is the heaviest tank in the Tank Museum? Which is the fastest tank in the Tank Museum? Which tank in the Tank Museum has the thickest armour? Which tank in the Tank Museum has the largest gun?