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Introduction: This article narrates the rise of the Yuan Dynasty. After the Mongols broke their promise to the Song, Kublai Khan embraced Han governance to rule Central Plains. He won the Mongol succession war, founded the Yuan in 1271, built Dadu (Beijing) as capital, and prepared to conquer the Southern Song.
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Introduction: This article records the fall of the Jin Dynasty. Besieged by Mongol armies, the Jin made a fatal mistake by attacking the Southern Song. The Song allied with the Mongols out of hatred, jointly destroying the Jin in 1234. This short‑sighted partnership removed the Jin buffer, soon exposing the Song to Mongol conquest.