 The Ayyubids had been under the nominal sovereignty of the Mongol Empire after a Mongol force targeted Ayyubid territories in Anatolia in 1244. An-Nasir Yusuf sent an embassy to the Mongol capital Karakorum in 1250, shortly after assuming power. These understandings did not last, however, and the Mongol Great Khan, Möngke, issued a directive to his brother Hulagu to extend the realms of the empire to the Nile River. The latter raised an army of 120,000 and in 1258, sacked Baghdad and slaughtered its inhabitants, including Caliph al-Musta'sim and most of his family after the Ayyubids failed to assemble an army to protect the city. That same year the Ayyubids lost Diyar Bakr to the Mongols.
