Bayan of the Baarin, the Mongol commander, then sent half of his force up river to wade to the south bank in order to build a bridge across to take the Yang lo fortress .Three thousand Song boats came up the Han river and were repulsed;fifty boats destroyed with 2,000 dead. Xianyangs commander then surrendered to the Mongol commander ,the entire force including the surrendering commander sailing down the Yangtze, the forts along the way fallin...