 In 1618, the upstart Jianzhou Jurchen leader Nurhaci united the tribes of Manchuria and declared war on the Ming.After the Fushun garrison within the Liaodong Wall surrendered to Nurhaci the next year, the Ming court assembled a Chinese–Korean army numbering above 100,000 men to contain him, but they were catastrophically defeated at the Battle of Sarhu.Nurhaci made substantial progress in his conquest of Liaodong until he was mortally wounded at the 1626 Battle of Ningyuan by Yuan Chonghuan.