Rashid al-Din gives detailed account of his birth on Jami' al-Tawarikh - he was born to Hulagu and his Oirat wife Öljei on 23 October 1256 at night. He was youngest son of his father. At age of 5 he was betrothed to Abish Khatun, marrying her in 1272, also gaining governance of Shiraz.[3]
He was appointed by his brother Abaqa to organize defense lines on Caucasus against Golden Horde at the start of his career in 1266. Later he moved on to the Egyptian border, heading a 50,000 strong army towards Mamluk sultan Qalawun in 1281. He was aided by Armenians under Leo II and Georgians under Demetrius II. Möngke was wounded during the battle and subsequently fled. He stayed for a while at Mosul to recover.[4] His main supporters for throne were his mother Öljei and his Oirat kinsmen after Abaqa's death. However, he also died unexpectedly several days on 26 April 1282. According to Rashid al-Din, he was his brother's chosen successor.[5] His descendant Pir Husayn, was the last legitimate Hülaguid to hold the throne.
Family
He married several times with issues:
Principal wife — Öljei Khatun (his cousin and daughter of Buqa Timur of Oirats)
Ara Qutlugh — married to Taraghai (son of Buqa Timur and his Möngke's cousin), later married to Tuladai Noyan
Second, later principal wife — Abish Khatun (betrothed in 1261, married in 1272)