Uskhal Khan, Emperor Tianyuan of Northern Yuan

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Uskhal Khan, Emperor Tianyuan of Northern Yuan
Birth and death: Unknown1388¹
Family name: Clan Name (Obogh)
Borjigin
Khalkha Mongolian: Боржигин
Chinese: 孛兒只斤
Given name: Tögüs Temür
Chinese: 脫古思鐵木兒
Dates of reign: 13781388
Dynasty: Northern Yuan (北元)
Era name: Tianyuan (天元)
Era dates: 13781388²
Temple name: Yizong (益宗)
Posthumous name:
(short) 
Ningxiao Emperor (宁孝皇帝 Ningxiao Huangdi)
Posthumous name:
(full) 
None Given
General note: Dates given here are in the Julian calendar.
They are not in the proleptic Gregorian calendar.

Uskhal Khan, born Tögüs Temür (r. 1378-1388), was the Mongol Khan of the Yuan Dynasty in Mongolia. He used the era name Tianyuan (天元).

Although Ming sources say that he was a son of Biligtü Khan, Tögüs Temür was his younger brother[citation needed]. He succeeded to the throne after Biligtü Khan died in 1378. He continued to press the Ming from the north, cooperating with Naghachu of the Jalayir in Manchuria. However, he suddenly faced a predicament in 1387 when Nagachu surrendered to the Ming due to a devastating famine. In 1388 he was raided by the Ming on the Buyir Nuur. In his escape to Karakorum, he was killed on the Tuul River by Yesüder, a descendant of Arigh Bukha. This marked the fall of the Khubilai line and the rise of the Oirats.

Uskhal Khan, Emperor Tianyuan of Northern Yuan
Died: 1388
Regnal titles
Preceded by
Biligtü Khan, Emperor Zhaozong
Khan of the Mongols
1378-1388
Succeeded by
Jorightu Khan, Emperor Xingyuan
Titles in pretence
Preceded by
Biligtü Khan, Emperor Zhaozong
— TITULAR —
Emperor of Yuan Dynasty
1378-1388
Reason for succession failure:
Ming Dynasty overthrew the Yuan Dynasty in 1370
Succeeded by
Jorightu Khan, Emperor Xingyuan
— TITULAR —
Emperor of China
1378-1388
Reason for succession failure:
Ming Dynasty established effective control over China in 1370
Succeeded by
Jorightu Khan, Emperor Xingyuan
Hongwu Emperor of Ming Dynasty wielded actual authority over China