 Muhanna was succeeded by his son Muzaffar ad @-@ Din Musa , who had remained loyal to an @-@ Nasir Muhammad during his father 's defection to the Ilkhanate . An @-@ Nasir Muhammad granted him substantial iqtaʿat in return for his loyalty and the supply of noble Arabian horses , which an @-@ Nasir Muhammad was particularly fond of . An @-@ Nasir Muhammad 's lavish treatment of Musa and his family significantly empowered the Al Fadl and created " ties of obligation " that " could not be ignored by his [ an @-@ Nasir Muhammad 's ] successors without provoking a Bedouin mutiny " , according to historian Amalia Levanoni . This was especially so as central government control over Syria increasingly diminished during the power vacuum following an @-@ Nasir Muhammad 's death . Rivalry over the imarat al @-@ ʿarab between the descendants of Muhanna and Fadl also intensified during this period . When Isa ibn Fadl was made amir al @-@ ʿarab in 1342 and was transferred the Al Muhanna 's iqtaʿat , the Al Muhanna responded by assaulting Fadl 's offspring and plundering caravans traveling the roads of northern Syria . This included a raid on a Rahba @-@ bound caravan from Baghdad in which Al Muhanna tribesmen looted all of its merchandise . Isa was replaced by his brother Sayf in 1343 , after which Muhanna 's son Fayyad defeated Sayf in battle and seized 20 @,@ 000 of his camels . Ahmad ibn Muhanna , who had been imprisoned in 1342 , was reappointed amir al @-@ ʿarab in 1345 , and was succeeded two years later by Fayyad . 
