how hulagu khan died：Siege of Baghdad

Mongol conquest of the Abbasid Caliphate

The siege of Baghdad took place in early 1258 at Baghdad, the historic capital of the Abbasid Caliphate. After a series of provocations from its ruler, Caliph al-Mustasim, a large army under Hulegu, a prince of the Mongol Empire, attacked the city. Within a few weeks, Baghdad fell and was sacked by the Mongol army—al-Mustasim was killed alongside hundreds of thousands of his subjects. The citys fall has traditionally been seen as marking the end of the Islamic Golden Age; in reality, its ramifications are uncertain.

After the accession of his brother Möngke Khan to the Mongol throne in 1251, Hulegu, a grandson of Genghis Khan, was dispatched westwards to Persia to secure the region. His massive army of over 138,000 men took years to reach the region but then quickly attacked and overpowered the Nizari Ismaili Assassins in 1256. The Mongols had expected al-Mustasim to provide reinforcements for their army—the Caliphs failure ...