Rule dating younger
By the 1st century BC, a neighboring kingdom arose in the Yarlung Valley, and the Yarlung king, Drigum Tsenpo, attempted to remove the influence of the Zhang Zhung by expelling the Zhang's Bön priests from Yarlung.
He was assassinated and Zhang Zhung continued its dominance of the region until it was annexed by Songtsen Gampo in the 7th century.
In AD 108, "the K'iang or Tibetans, who were then entirely savage and lived a nomadic life west and south of the Koko-nor, attacked the Chinese posts of Kansu, threatening to cut the Tunhwang road.
Liang K'in, at the price of some fierce fighting, held them off." Similar incursions were repelled in AD 168-169 by the Chinese general Tuan Kung.
A civil war ensued, which effectively ended centralized Tibetan administration until the Sa-skya period.
Ösung's allies managed to keep control of Lhasa, and Yumtän was forced to go to Yalung, where he established a separate line of kings. The son of Ösung was Pälkhortsän (Dpal 'khor brtsan) (865–895 or 893–923).
Thrikhyiding migrated to the western Tibetan region of upper Ngari (Stod Mnga ris) and married a woman of high central Tibetan nobility, with whom he founded a local dynasty.
Tibet lies between the core areas of the ancient civilizations of China and of India.
Extensive mountain ranges to the east of the Tibetan Plateau mark the border with China, and the towering Himalayas of Nepal and India form a barrier between Tibet and India.
But the monkey was a manifestation of the bodhisattva Chenresig, or Avalokiteśvara (Tib.
Spyan-ras-gzigs) while the ogress in turn incarnated Chenresig's consort Dolma (Tib.
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Traditional Tibetan history preserves a lengthy list of rulers whose exploits become subject to external verification in the Chinese histories by the 7th century.