change their religion. Möngke also informed Hethum that he was preparing to mount an attack on Baghdad and that he would remit Jerusalem to the Christians if they collaborated with him. Hethum strongly encouraged other Crusaders to follow his example and submit to Mongol overlordship, but he persuaded only his son-in-law Bohemond VI, ruler of the Principality of Antioch and County of Tripoli, who offered his own submission sometime in the 1250s. The armies of the Armenian Kingdom of Cilicia and Bohemond VI would assist Möngke's army in the West soon. Shamans played an important role in the court and sometimes influenced the war preparation. Period of conquests Capitulation of Goryeo As Khagan, Möngke seemed to take the legacy of world conquest he had inherited much more seriously than had Güyük. His conquests were all directed at East Asia and the Middle East. In his first plans for additional conquests, Möngke chose Korea and the Dali Kingdom in Yunnan in 1252. Möngke sent envoys to Goryeo, announcing his coronation in October 1251. He also demanded that King Gojong submit before him in person and to move his headquarters from Ganghwa Island to the mainland of Korea. But the Goryeo court refused to send the king because he was elderly and unable to travel so far. Möngke dispatched his envoys with specific tasks again. The envoys were well received by the Goryeo officials, but they criticized the Goryeo officials because their king did not follow his overlord Möngke's orders. Möngke ordered prince Yeku to command the army against Korea. However, a Korean in the court of Möngke convinced them to begin their campaign in July 1253. Yeku, along with Amuqan, demanded that the Goryeo court surrender. The court refused but did not resist the Mongols and gathered the peasantry into mountain fortresses and islands. Working together with the Goryeo commanders who had joined the Mongols, Jalairtai Qorchi ravaged Korea. When one of Yeku's envoys arrived, Gojong personally met him at his new palace. The king Gojong sent his stepson as hostage to Mongolia. The Mongols agreed to a ceasefire in January 1254. Möngke realized that the hostage was not the blood prince of the Goryeo dynasty and blamed the Goryeo court for deceiving him. Möngke's commander Jalairtai devastated much of Goryeo and took 206,800 captives in 1254. Famine and despair forced peasants to surrender to the Mongols. They established a chiliarchy