Song general Meng Gong defeats the Jin general Wu Xian and directs his troops to besiege the city of Caizhou, to which the last emperor of the Jurchen has fled.

With the help of the Mongols, the Song armies are finally able to extinguish the Jin Dynasty that has occupied northern China for more than a century.

The Jin dynasty has been extinguished and the surviving Jurchens have been driven north.

Song generals field their armies to occupy the old capitals of the Song in 1235, but they are completely repelled by the Mongol garrisons under Tachir, a descendant of Boorchu, who had been a famed companion of Genghis Khan.

Thus the Mongol troops, headed by sons of Ögedei Khan, start their slow but steady invasion of the south.

The fierce resistance of the Song forces results in the Mongols having to fight the most difficult war in all of the conquests they have made.

The Song Chinese offer the fiercest resistance among all the nations that the Mongols have fought, the Mongols requiring every advantage they can gain in order to prevail.