 Raynald was a firm supporter of Baldwin IV 's sister , Sybilla , and her husband , Guy of Lusignan , during conflicts regarding the succession of the king . Sibylla and Guy were able to seize the throne in 1186 due to Raynald 's co @-@ operation with her uncle , Joscelin III of Courtenay . Raynald attacked a caravan travelling from Egypt to Syria in late 1186 or early 1187 , claiming that the truce between Saladin and the Kingdom of Jerusalem did not bind him . After Raynald refused to pay a compensation , Saladin invaded the kingdom and annihilated the crusader army in the Battle of Hattin . Raynald was captured in the battlefield . Saladin personally beheaded him after he refused to convert to Islam . Most historians have regarded Raynald as an irresponsible adventurer whose lust for booty caused the fall of the Kingdom of Jerusalem . On the other hand , Bernard Hamilton says that he was the only crusader leader who tried to prevent Saladin from unifying the nearby Muslim states . 
