Religion in the Mongol Empire John of Montecorvino who was appointed by the Papal states of Europe. The religion never achieved a great position in the Mongol Empire, but many Great Khans and lesser leaders were raised by Christian mothers and educated by Christian tutors. Some of the major Christian figures among the Mongols were: Sorghaghtani Beki, daughter in law of Genghis Khan, and mother of the Great Khans Möngke, Kublai, Hulagu and Ariq Boke; Sartaq, khan of Golden Horde; Doquz Khatun, the mother of the ruler Abaqa; Nayan, a descendant of one of Genghis Khan's brothers, who raised a rebellion against Kublai in Manchuria;
Mongol invasions of Vietnam repeatedly ignored demands to attend the Yuan court and offer his personal submission to the Great Khan. By 1266, a standoff developed, as the Emperor Thánh Tông sought a loose tributary relationship, while Kublai demanded full submission. Trần Thánh Tông sent an official letter requiring Kublai to take his darughachi back. Because of civil war in the Mongol Empire, and the Yuan conquest of Song China, armed conflict was delayed. Instead, Kublai reminded him of the peace treaty signed by the Mongols and Đại Việt. As a result of the Mongol conquest of the Song Empire, by 1278–79, Mongol troops