What is xueyantuo?

Xueyantuo

The Xueyantuo (薛延陀) (Seyanto, Se-yanto, Se-Yanto) or Syr-Tardush were an ancient Tiele people and khanate in central/northern Asia who were at one point vassals of the Gokturks, later aligning with China's Tang Dynasty against the Eastern Gokturks. Xueyantuo started from Selenga River/Xueyanhe River (薛延河江/偰輦河江), so tribe name is Seyanto/Xueyantuo (薛延陀), Chinese Han character undergo considerable revision by rise and fall of Chinese Dynasty, so have many name as Xueyantuo, Xueyanhe, Xienianhe, Seyanto, Selenga, Selyanha, etc. .

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Some articles on xueyantuo:

Xueyantuo - Surname of Khans
... The surname of Xueyantuo's khans are uncertain, although modern Chinese historian Bo Yang listed their surname as "Yishi" in his edition (also known as the Bo Yang Edition) of the Zizhi Tongjian, but Bo cited ... that Bo was influenced by the Tongdian which asserted the Xueyantuo surname as Yilitu (壹利吐, Yiliduo 一利咄 as in Cefu Yuangui and Yilidie 壹利咥 as in New Book of Tang) or certain ... in the original, referred to one ethnic Xueyantuo general named Duomo, possibly the Yitewushi Khan (after he became a Tang general) by the family name of Xue ...
Zhenzhu Khan
... name Yi'nan (夷男), full regal title Zhenzhupiqie Khan (真珠毗伽可汗), was a khan of Xueyantuo, under whom Xueyantuo rose from being a vassal ... During his reign, Xueyantuo largely aligned with China's Tang Dynasty, even though the two states were at odds at times, with the most serious dispute involving Tang's attempt to reestablish Eastern Tujue ... Throughout Yi'nan's reign, Xueyantuo remained powerful despite Tang attempts to curb its power, but after Yi'nan's death, a succession dispute between his sons, Bazhuo and Yemang (曳莽), led to Bazhuo's killing ...
Yitewushi Khan
... personal name Duomozhi (咄摩支), was the last khan of Xueyantuo ... about Duomozhi's background, other than that he was a nephew of Xueyantuo's greatest khan, the Zhenzhu Khan Yi'nan ... In 646, during the reign of Yi'nan's son and successor, the Duomi Khan Bazhuo, Xueyantuo fell into a state of confusion due to a combination of attacks by China's Tang Dynasty, misrule by Bazhuo, and ...
Duomi Khan - As Khan of Xueyantuo
... However, Emperor Taizong, anticipating the possibility of a Xueyantuo attack, had had the general Zhishi Sili (執失思力) command Tujue soldiers to defend Xia Prefecture (夏州, roughly modern ... counterattacked, defeating Bazhuo and forcing him to flee, throwing Xueyantuo into a state of confusion ... he responded by killing a large number of them, throwing the Xueyantuo court into terror ...
Tang Dynasty In Inner Asia - History - Tang Expansion - Tang Conquest of Xueyantuo
... Xueyantuo had helped Tang armies defeat the Eastern Gokturks, but after the demise of the Eastern Gokturks, Xueyantuo-Tang relations turned hostile because Xueyantuo kept on making attacks on Gokturks who were ... In 642, Taizong sent an army to attack Xueyantuo and destroyed it ...