Elbeg Khan appointed Bahamu (Batula, Mahamu, Muhamud) ruler of the Four Oirats after he had mistakenly executed his father Khuuhai. The Khagan's decision disappointed the Oirat Torguud clan leader Ugetchi Khashikha (Mongolian: Үхэрчин хашха; Chinese: 烏格齊哈什哈, "Khashikha" means prince or duke in the Tungusic languages). Ugetchi Khashikha and Bahamu organized the plot to kill Elbeg and succeeded; the former seized the family and property of the late Khagan. There's a dispute over whether Örüg Temür was the same person as Ugechi Khashikha himself, because the Ming Dynasty recorded fierce battles between Guilichi of Eastern Mongols and Oirat's leaders.[6] Thus, it is still unclear whether he was an Oirat or a Genghisid. The History of Ming recorded that Guilichi became the new khagan in 1402 and abolished the dynastic title of "Great Yuan" (大元) promulgated in 1271 by Kublai; however, the Han-style title had already been abolished in 1388.[7]
Reign
Guilichi appointed Arughtai of the Asudchingsang of the Eastern Mongols. According to Ming annals, he might have nominated a “Tatar” (East Mongols) khan. The Yongle Emperor made overtures to Guilichi and his principal retainer Arughtai to establish a relationship within Ming China's tributary system, but Guilichi and Arughtai rejected it.[8] They also poisoned Engke Temur, Prince of Hami, who had allied with the Ming.[8] However, Guilichi was defeated by Öljei Temür Khan, the Kublaid descent Borjigin monarch, in 1403. In 1408, his former chingsang and noyan Arughtai killed him after a conflict erupted between them.
^宝音德力根, Buyandelger (2000). "15世紀中葉前的北元可汗世系及政局 (Genealogy and political situation of the Northern Yuan Khans of the mid-15th century)". 蒙古史研究 (Mongolian History Research). 6: 132–136.
^東京外国語大学. アジア・アフリカ言語文化研究所-アジア・アフリカ言語文化研究, Issues 27–30, p. 152.
^薄音湖 (1987年). "关于北元汗系". 内蒙古大学学报 (第三期): 47. Explain that Guilichi should be nickname rather than his real name, meaning "beggar" in Mongolian
^C. P. Atwood-Encyclopedia of Mongolia and the Mongol Empire, list of heads of Mongolia