Raymond III, Count of Tripoli

Raymond III of Tripoli (c. 1140 – September or October 1187) was from 1152 to his death.

Initially an enemy of his fellow crusader Guy of Lusignan, Raymond reconciled with his foe in light of the increasing threat posed by the sultan Salāḥ ad-Dīn. In 1187, Raymond's fief of was besieged by Salāḥ ad-Dīn, and Guy marched to relieve him. Outside Tiberias, Guy and Raymond engaged the Saracens in the Battle of Hattin. Although the latter was able to escape, Guy and most of the surviving crusaders were captured after suffering a crushing defeat.

Reference

 * Assassin's Creed: Initiates - The Middle Ages: "The Battle of Hattin"