Saladin is a Muslim and sultan leader who commanded Islamic forces during European crusades. His power included Egypt, Syria, Mesopotamia, Hejaz, Yemen and other parts of North Africa. Some of his contributions are the following:
*He triumphed against the crusaders at Battle of Hattin on 1187 making a re-conquest to Holy Land cities in the East.
*Though failed to win against King Richard I (the Lionheart) of England, he was able to made truce continuing Muslim control over Jerusalem.
*He keeps having holy wars to exterminate political and military influence of Christian in Jerusalem.