Leonardo da Vinci’s 1487 fighting-vehicle design is most famous for anticipating the tank.
His armored vehicle was drawn as a conical, turtle-like structure with sloped protective plates. It included space for men inside and provisions for weapons around the platform, while wheels beneath it were intended to provide movement.
The vehicle was never built as a battlefield machine in Leonardo’s time. Its proposed mechanism appears impractical, and some accounts suggest the drawing may contain an intentional gearing problem or design error.
It is not accurate to call Leonardo the inventor of the modern tank. Tanks require engines, tracks, armor engineering, and coordinated military systems developed much later. His design is better understood as an early armored fighting-vehicle concept.