>...But spoiler Genghis Khan found a way around that problem. It was Kublai Khan who founded the Yuan dynasty. >...After two decades of sporadic warfare, Kubl

>...But spoiler Genghis Khan found a way around that problem. It was Kublai Khan who founded the Yuan dynasty. >...After two decades of sporadic warfare, Kublai Khan's armies conquered the Song dynasty in 1279 after defeating the Southern Song in the Battle of Yamen, and reunited China under the Yuan dynasty https://en.wikipedia.org/wiki/Song_dynasty https://en.wikipedia.org/wiki/Song_dynasty