it has been a historical fact and reality that the founder of Ayyubid Sultanate name Salahuddin Ayyubi was the greatest general of the 12th century and he is still a legend.
As, during the battle of Hattin in 1187, Salahuddin Ayyubi defeated the crusaders in what is said to be a military masterstroke, when he cut the water access to the enemy and they started to death.
