Wall Defense Leonardo designed complex and ingenious methods of defence. Here, when the walls are under attack, the soldiers hidden behind the battlements could quickly and easily ward-off enemies and their single movement by using a system of levers. As the enemy used ladders in an attempt to breach the walls, the levers were engaged to move the rails built into the walls that the ladders were leaning on, causing them to become unstable and eventually fall. TankThis is perhaps one of the most famous of Da Vinci’s projects. His idea of reaping panic and destruction












