Mongol Empire What is referred to in English as the Mongol Empire was called the "Ikh Mongol Uls" ("ikh": "great", "uls": "state"; Great Mongolian State). In the 1240s, one of Genghis's descendants, Güyük Khan, wrote a letter to Pope Innocent IV which used the preamble "Dalai (great/oceanic) Khagan of the great Mongolian state (ulus)". After the succession war between Kublai Khan and his brother Ariq Böke, Ariq limited Kublai's power to the eastern part of the empire. Kublai officially issued an imperial edict on 18 December 1271 to name the country Great Yuan ("Dai Yuan", or "Dai Ön Ulus") to establish the
Society of the Mongol Empire darughachi and judges in the appanages instead direct distribution without the permission of Great Khan thanks to genius Khitan minister Yelu Chucai. Kublai Khan continued Ögedei's regulations somehow, however, both Güyük and Möngke restricted the autonomy of the appanages before. Ghazan also prohibited any misfeasance of appanage holders in Ilkhanate and Yuan councillor Temuder restricted Mongol nobles' excessive rights on the appanages in China and Mongolia. Kublai's successor and Khagan Temür abolished imperial son-in-law Goryeo King Chungnyeol's 358 departments which caused financial pressures to the Korean people, whose country was under the control of the Mongols. The appanage system was