Mongol capture of Alamut Castle

Timeline

1. 1256Northern foothills of the Alborz Mountains, Persia · PersiaOrdered by Möngke Khan, Hulegu led the Mongol western expedition into Persia, dividing his forces to sweep the dozens of Assassin castles scattered along the southern Caspian coast and the Alborz Mountains, gradually squeezing the Nizari Ismailis' room to survive and advancing toward the core stronghold of Alamut.
2. 1256Alamut Castle · Alborz MountainsThe Mongols surrounded Alamut Castle built atop a cliff, cutting off supplies and bombarding its defenses. The Assassins had already lost most outlying positions, and the garrison and populace faced depleted food and no relief under the prolonged siege; Imam Rukn al-Din Khurshah began negotiating surrender terms with Hulegu.
3. 1256Alamut Castle · Alborz MountainsRukn al-Din Khurshah emerged with his followers to surrender, and the Mongols took over Alamut Castle. Hulegu subsequently executed Rukn al-Din and ordered the fortifications and library demolished, ending the Assassins' history as an independent political-military power and breaking the fragmented rule of the Persian highlands under Mongol domination.