of Uladai Küregen) Yesü'er Khatun (d. after 1260) Oghul Tutmish or Oghul Qaimish (daughter of Qutuqa Beki of Oirats) Princess Shirin — married to Chochimtai Küregen (son of Taiju Küregen of Olkhunut) Princess Bichige — married to Chochimtai Küregen (son of Taiju Küregen of Olkhunut) Chübei Khatun (d. 8 September 1259) Concubines: Bayavchin (from Bayaut tribe) Shiregi (d. 1280s) Quitani (from Eljigin clan of Khongirad) Asutai — supported the election of Ariq Böke Öljei Hulachu Hantum Öljei Buqa Death There is no agreed conclusion amongst modern historians and pundits as to the exact cause of Möngke Khan's untimely death. It is known that his final battle action took place at Diaoyu Fortress in modern-day Chongqing, where it's generally agreed that Möngke died, after which the Mongol-led armies were forced to withdraw from all battlefronts. In Chinese sources, Möngke is reported to have been killed in battle during an assault on Diaoyu Fortress. A contemporary poem by a Southern Song writer describes the "victory in Sichuan" where Möngke is said to be killed by a crossbow arrow at the siege, which is corroborated by the writings of the Syriac monk Bar Hebraeus. The official History of Yuan account, written in the Ming dynasty, however, tells that he died of a wound caused by a stone projectile that was either fired by cannon or launched from a trebuchet. Given the lack of clarity that Mongol historiography tends to describe the deaths of khans, it is possible that Mongols covered up the story by claiming that his death was due to illness, leading to the story in Persian accounts. Persian accounts largely originating from Rashid al-Din claim that Möngke died of dysentery or cholera near the site of the siege on 11 August 1259 — the Chinese source History of Yuan does not directly corroborate this, but it mentions an outbreak of a fatal disease in the Mongol camp during the campaign. Other less credible accounts include the Armenian historian Hayton of Corycus's claims that Möngke was on a Mongol war ship that sank in the Chinese seas while the Mongols were besieging an island fortress. Hayton's work is noted for its glaring errors and amalgamation of events, so his account of Möngke's death could be a confused reference to Kublai Khan's invasions of Japan. A month after Möngke's death, his youngest wife Chubei died at the Liupanshan Mountains. Möngke's son Asutai conducted