What kind of protective vehicle did Leonardo da Vinci sketch for soldiers and weapons?

Leonardo da Vinci sketched an armored vehicle intended to protect soldiers while carrying weapons.

His late-fifteenth-century design resembles a large conical or turtle-shaped cover mounted on wheels. The sloping outer shell was intended to deflect attacks, while openings around the vehicle allowed crews to operate weapons. Leonardo also included internal mechanisms for turning the wheels.

The machine is often called Leonardo’s fighting vehicle or, more loosely, an early tank. That modern comparison is useful but imperfect: the sketch predates engines, armored warfare, and the tracked vehicles used by twentieth-century armies. The proposed vehicle would have depended on people turning cranks and would have been difficult to move over uneven ground.

A famous drawing appears to contain a gearing problem that would prevent the vehicle from moving as shown. Some historians regard that feature as a deliberate error, while others see it as a design flaw. Either way, the concept demonstrates Leonardo’s interest in combining protection, mobility, and firepower.