Which military vehicle designed by Leonardo da Vinci resembled a modern tank?

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Self-portrait of Leonardo da Vinci drawn in red chalk, showing an elderly man with long hair and a flowing beard, with a serious, contemplative expression. — Leonardo da Vinci Self-portrait, drawing by Leonardo da Vinci, c. 1517–18; in the Royal Library, Turin, Italy.

Leonardo da Vinci is often credited with designing a "moving fortress" that bears a resemblance to a modern tank.12

While Leonardo is frequently cited as the inventor of this and other devices, such as the helicopter and parachute, it is important to note that later scholarship has disputed these claims of direct invention. Furthermore, like many of his other vehicle designs, his concept for the moving fortress faced significant practical limitations, specifically the lack of an adequate power source to provide the necessary propulsion.12