Badr al-Din Lu'lu' acknowledged Mongol suzerainty to secure his realm as early as 1252, and minted coins in the name of Great Khan Möngke Khan in 1255 at the latest. He is also known to have had a mosque built at Jazirat Ibn ʿUmar. Badr al-Din became subject to the Mongol Ilkhanate on Hulagu Khan's assumption of the title "Ilkhan" (subject khan) in 1256. Badr al-Din Lu'lu' died in July/August 1259, and his realm was divided between his sons, and Jazirat Ibn ʿUmar was bequeathed to his son al-Malik Al-Mujahid Sayf al-Din Ishaq. The sons of Badr al-Din Lu'lu' chafed under Mongol rule and soon all had rebelled and travelled to Egypt seeking military assistance as al-Muzaffar Ala al-Din Ali left Sinjar in 1260, al-Salih Rukn al-Din Ismail left Mosul in June 1261, and finally Ishaq fled Jazirat Ibn ʿUmar for Egypt shortly afterwards. Prior to his flight, Ishaq extorted 700 dinars from the city's Christians, and news of his impending escape pushed the populace to riot against his decision to leave the city to the wrath of the Mongols.