Mongol conquest of Western Xia Mongol conquest of Western Xia The Mongol conquest of Western Xia was a series of conflicts between the Mongol Empire and the Western Xia (Xi Xia) dynasty, also known as the Tangut Empire. Hoping to gain both plunder and a powerful vassal state, Mongol leader Genghis Khan commanded some initial raids against Western Xia before launching a full-scale invasion in 1209. This marked both the first major invasion conducted by Genghis and the beginning of the Mongol invasion of China. Despite a major set-back during a nearly year-long siege of the capital, Yinchuan, when the diverted river accidentally flooded their
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