Leonardo da Vinci’s armored vehicle design resembled a tank in modern military terms. He drew a conical, turtle-like vehicle covered with armor and fitted with guns around its perimeter.
The vehicle was intended to move across a battlefield while protecting the people inside. Leonardo’s plan used several wheels driven by cranks operated by men inside the vehicle. The sloping armor was designed to deflect incoming projectiles, while the surrounding guns would allow the crew to fire in multiple directions.
It is often called Leonardo’s tank, although the word tank belongs to much later military history. The design was never built for battle, and historians have noted a possible mechanical problem: the original gear arrangement appears to make the wheels turn in conflicting directions. Some researchers think this may have been deliberate, perhaps to prevent the design from being used, while others regard it as an error.
The proposal demonstrates Leonardo’s interest in combining armor, mobility, and concentrated firepower in one machine.