During the five years following the death of Ogotai, the Mongols were absorbed in the question who should be their next Great Khan, and it was only after a warm and protracted discussion, which threatened to entail the disruption of Mongol power, and the revelation of many rivalries among the descendants of Genghis, that Kuyuk, the eldest son of Ogotai, was proclaimed emperor. At the kuriltai held for this purpose, all the great Mongol leaders were present, including Batu, the conqueror of Hungary, and after the Mongol chiefs had agreed as to their chief, the captive kings, Yaroslaf of Russia and David of Georgia, paid homage to their conqueror. We owe to the monk Carpino, who was sent by the Pope to convert the Mongol, a graphic account of one of the most brilliant ceremonies to be met with in the whole course of Mongol history. The delay in selecting Kuyuk, whose principal act of sovereignty was to issue a seal having this inscription: "God in Heaven and Kuyuk on earth; by the power of God the ruler of all men," had given the Sungs one respite, and his early death procured them another. Kuyuk died in 1248, and his cousin, Mangu, the son of Tuli, was appointed his successor. By this time the Mongol chiefs of the family of Genghis in Western Asia were practically independent of the nominal Great Khan, and governed their states in complete sovereignty, and waged war without reference to Karakoram. This change left the Mongols in their original home of the Amour absolutely free to devote all their attention to the final overthrow of the Sungs, and Mangu declared that he would know no rest until he had finally subjected the last of the Chinese ruling families. In this resolution Mangu received the hearty support of his younger but more able brother, Kublai, to whom was intrusted the direction in the field of the armies sent to complete the conquest of China.