أرناط
Humphrey's stepfather, Raynald of Châtillon, plundered a caravan moving from Egypt to Syria in early 1187, claiming that the truce between the Kingdom of Jerusalem and Saladin did not cover his Lordship of Oultrejourdan. After Guy of Lusignan failed to persuade Raynald to pay compensation, Saladin proclaimed a jihad (holy war) against the Kingdom of Jerusalem. Saladin's army crushed the united forces of the kingdom in the Battle of Hattin on 4 July 1187.