Siege of Maymun-Diz

Siege of Maymun-Diz
Part of the Mongol campaign against the Nizaris
Date 8–23 November 1256 (15 days) Location Maymun-Diz (exact location disputed), Rudbar of Alamut Result Mongol victory The Nizari leadership capitulated Maymun-Diz and most other Nizari fortresses capitulated and were demolished
Belligerents
Mongol Empire Golden Horde Chagatai Khanate Oirats Supported by the local rulers of Anatolia, Tabaristan, Fars, Iraq, Azerbaijan, Arran, Shirvan, Georgia, and Armenia	Nizari state of Alamut
Commanders and leaders
Hülegü Kitbuqa Tegüder Buqa Temür Köke Ilgei Guo Kan Quli Balagha Tutar Abaqa Yoshmut Arghun Aqa	Imam Rukn al-Din Khurshah  Khwaja Nasir al-Din Tusi
Strength
80,000 men 1,000 squads of siege engineers	Heavily outnumbered and outgunned

The siege of Maymun-Diz, an unlocated fortress and the stronghold of the leader of the Nizari Ismaili state, Imam Rukn al-Din Khurshah, occurred in 1256, during the Mongol campaign against the Nizaris led by Hülegü.

The new Nizari Imam was already engaged in negotiations with Hülegü as he was advancing toward his stronghold. The Mongols insisted that all Nizari fortresses be dismantled, but the Imam tried to negotiate a compromise. After several days of fighting, the Imam and his family capitulated and were received well by Hülegü. Maymun-Diz was demolished, and the Imam ordered his subordinates to surrender and demolish their fortresses likewise. The subsequent capitulation of the symbolic stronghold of Alamut marked the end of the Nizari state in Persia.