Jin–Song Wars
In 1115, Jurchen tribes rebelled against their overlords, the Khitan Liao dynasty, and declared the formation of the Jin. The Jin promised to return to the Song the Sixteen Prefectures that had fallen under Liao control since 938. After the demise of Jin, the Song became a target of the Mongols, and collapsed in 1279. The wars engendered an era...
