Italian tanks have five gears, one forward and four reverse
An hilarious joke.
See also:
Question; What's the difference between a piece of bread and Italians?
Answer; You can make soldiers out of a piece of bread.
(International Translation Note: 'Soldiers' when made from bread are thin strips of buttered bread used for dipping into a boiled egg. Thus one's Mum would say 'Do you want a chucky egg and soldiers for your lunch?')