China employed multiple layered strategies against Mongol incursions across the 13th century, yet ultimately fell to the Yuan Dynasty (1279–1368). Here's the historical breakdown:
Successive dynasties maintained and extended the Wall as a northern barrier. While not impenetrable—Mongols bypassed or breached sections—it forced predictable crossing points, slowed cavalry, and enabled signaling.
Song and Jin courts sent envoys, gifts, and periodic tribute to Mongol khans, seeking temporary peace or favorable trade terms. This bought time but signaled weakness, inviting greater demands.
Attempted coalitions with Tibet, Dali, and even the Jin (fellow Chinese dynasty) against the Mongols. Mutual distrust and Mongol diplomatic sabotage prevented effective unity.
Chinese cities were walled, provisioned, and garrisoned. Siege warfare favored defenders—Mongols adapted with counterweight trebuchets (Islamic engineers), starvation tactics, and psychological terror.
Kublai Khan completed the conquest in 1279 at the Battle of Yamen. The Yuan Dynasty ruled until the Ming restoration in 1368.