Counterweight Trebuchets Break the Song Fortress of Xiangyang

In 1268, the forces of the Mongol ruler Kublai Khan encircled the fortified twin cities of Xiangyang and Fancheng, positioned across the Han River in modern Hubei province. Xiangyang stood as the primary obstacle to a southern conquest. Because the Han River flowed directly into the Yangtze River, controlling the fortress offered access to the heartland of the Southern Song dynasty. Recognising the site as vital to their survival, the Song had constructed formidable defences, including broad moats and strong walls.

Initial assaults revealed the limits of traditional Mongol siege warfare. The surrounding terrain and waterways constrained the movement of mounted cavalry, and early bombardment from traction trebuchets failed to crack the reinforced battlements. Song defenders held out behind deep walls and stockpiled provisions meant to withstand years of isolation. In response, Yuan commanders turned to encirclement, raising a ring of forts to sever overland approaches and deploying a fleet to monitor the Han River. Repeated relief operations by Song ground units were intercepted, leaving the garrison increasingly reliant on dwindling internal stores.