interpreted to be the end of Isma'ili influence in the region, various sources say that the Isma'ilis' political influence continued. In 674/1275, a son of Imam Rukn al-Din Khurshah managed to recapture Alamut, though only for a few years. The Nizari Imam, known in the sources as Khudawand Muhammad, again managed to recapture the fort in the fourteenth century. It is uncertain whether "Khudawand Muhammad" refers to Muhammad Shah b. Mu'min Shah of the Muhammad Shahi line of Nizari Imams, or Islam Shah b. Qasim Shah of the Qasim Shahi line. According to Mar'ashi, the Imam's descendants would remain at Alamut until the late fifteenth century. Isma'ili political activity in the region also seems to have continued under the leadership of Sultan Muhammad b. Jahangir and his son, until the latter's execution in 1006/1597. In Syria, the Assassins joined with other Muslim groups to oppose the Mongols and courted the Mamluks and Baibars. Baibars entered into a truce with the Hospitallers in 1266 and stipulated that the tribute paid by the Assassins be halted. The tribute once paid to the Franks was to come instead to Cairo. As early as 1260, Baibars' biographer ibn Abd al-Zahir reported that he was granting Assassin lands in [[Iqta'|iqtâ''']] to his generals, and in 1265 began to tax the "gifts" the Assassins received from various princes that apparently included Louis IX of France, Rudolph I of Germany, Alphonso X of Castile, and the Rasulid sultan of Yemen al-Muzaffar Yusuf. The Syrian branch of the Assassins was taken over by Baibars by 1270, recognizing the threat of an independent force with his sultanate. Najm ad-Din was replaced by Baibars' son-in-law Sarim al-Din Mubarak, governor of al-'Ullaiqah in 1270. Sarim was soon deposed and sent as a prisoner to Cairo, and Najm ad-Din was restored at chief da'i at Masyaf. His son Shams ad-Din joined him in service, but owing a tribute to the sultan. The next year, in the midst of the siege of Tripoli, two Assassins were sent by Bohemond VI of Antioch, then Count of Tripoli, to murder his attacker Baibars. Shams ad-Din was arrested in the plot, but released when his father argued his case. The Isma'ili leaders were eventually implicated and agreed to surrender their castles and live at Baibars' court. Najm ad-Din died in Cairo in 1274. In 1271, Baibars' forces seized al-'Ullaiqah and ar-Rusafa, after taking Masyaf the year