sentences:  The rebel movement gained thousands of followers within months.Yelü Liuge submitted to the Mongols and led the rebels to defeat a 600,000-strong Jin army in Dijinao'er (迪吉腦兒; near present-day Changtu County, Liaoning Province).Wanyan Yongji was known for being indecisive, undiscerning, and generally ineffective and weak as a ruler.