CHARIOT
The chariot that Leonardo invented would be attached to a horse. It was used to prevent the enemy from attacking the horse and also to conduct raids into a group of enemies. There is rotating blades on the front and the wheels were spiked. There was also blades at the back. These blades would be used to attack the enemy. Leonardo presented this to the duke Ludovico il Moro around 1485. They rebuilt it on a show called The Re-Inventors on the History Channel. On the episode they tested it with an ATV instead of a horse to make it more safe. The test worked correctly . http://www.youtube.com/watch?v=zGFEhYxpiRI