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
Mongol invasions of the Levant Seljukid Sultanate. Hulagu, with the backing of his brother the Great Khan Kublai, invaded and captured these territories in 1256, even installing his capital in the center of the disputed territories, at Maragha. Berke, the leader of the Golden Horde, could not tolerate this infringement of his inheritance, and a drawn-out conflict between the two Mongol realms continued well into the 14th century. Various affinities led to a more or less natural alliance between the Mongols of the Golden Horde and the Mamluks of Egypt. The Mamluks' Empire had been founded by former slaves bought from the Kipchack territory of