Elephants have been used in combat in India since around 1000 BC, yet during the time of the Mughals (1526-1858 AD), the War elephant reached the peak of their evolution, bearing both knight-like armor and, in some cases, a Gajnal cannon on their backs. It was the Abrams Tank of its day.
Battle vs Da Vinci's "Tank" by SPARTAN 119Edit
To be written
WINNER: Da Vinci's Tank
The experts believed that the 360 degree firepower of the tank's cannon battery, as well as the fact that, unlike an elephant, the tank can't go berserk if it sustains damage.