 An arrangement was negotiated whereby al @-@ Adil was to administer Aleppo in the name of Saladin 's son al @-@ Afdal , while Egypt would be governed by al @-@ Muzaffar Umar in the name of Saladin 's other son Uthman . When the two sons were to come of age they would assume power in the two territories , but if any died , one of Saladin 's brothers would take their place . In the summer of 1183 , after ravaging eastern Galilee , Saladin 's raids there culminated in the Battle of al @-@ <unk> in the Jezreel Valley between him and the Crusaders under Guy of Lusignan . The mostly hand @-@ to @-@ hand fighting ended indecisively . The two armies withdrew to a mile from each other and while the Crusaders discussed internal matters , Saladin captured the Golan Plateau , cutting the Crusaders off from their main supplies source . In October 1183 and then on 13 August 1184 , Saladin and al @-@ Adil besieged Crusader @-@ held Karak , but were unable to capture it . Afterward , the Ayyubids raided Samaria , burning down Nablus . Saladin returned to Damascus in September 1184 and a relative peace between the Crusader states and the Ayyubid empire subsequently ensued in 1184 – 1185 . 
