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Mangsong Mangtsen

Mangsong Mangtsen
Emperor of Tibet
Reign 650–676
Predecessor Songtsän Gampo
Successor Tridu Songtsen
Born mang-slon
?
Died 676
tshang-bang-sna, Tibet
Burial 679
sngo-zhe-rhal-po, pying-bar (mordern Qonggyai County)
Spouse 'bro za khri ma lod
Issue Tridu Songtsen
Full name
Khri-mang-slon-rtsan
Great Minister
Father Gungsong Gungtsen
Mother 'a zha sa mong rje khri da ka (from Tuyuhun)
Full name
Khri-mang-slon-rtsan

Mangsong Mangtsen (Tibetan: མང་སྲོང་མང་བཙན), Trimang Löntsen or Khri-mang-slon-rtsan (r. 650–676 CE) succeeded to the throne after the death of his grandfather, Songtsän Gampo, and was the second emperor of the newly created Tibetan Empire.

As Songtsän Gampo's only son had died early, he was succeeded by his infant grandson Mangsong Mangsten. Real power was left in the hands of the minister Gar Tongtsen (Mgar-srong-rtsan, or sometimes just mGar).

Relations between China and Tibet began to sour during this reign as he began to expand into Tang China's territory. In 658 Mangsong "again" sent presents to the Chinese emperor asking for a princess to marry, but this request was refused.

He then consolidated Tibet's hold over the whole of the Tibetan plateau controlling both the 'Aza in the east and Zhang Zhung in the west. But, by 658 China had gained control of both Khotan and Kucha and established protectorates as far as Sogdia and Kashmir.

Sometime prior to 662 Mangsong had allied himself with the Western Turks and together they began raiding Tang protectorates. They attacked Kashgar in 663, and Khotan in 665. In 667 the Turkic Nushibi of the On oq submitted to Tibet, which also controlled the strategic Wakhan valley.


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