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Reign of Langdarma (838–842)

The reign of Langdarma (Glang dar ma), regal title Tri Uidumtsaen (Khri 'U'i dum brtsan), was plagued by external troubles. The Uyghur state to the north collapsed under pressure from the Kyrgyz in 840, and many displaced people fled to Tibet. Langdarma himself was assassinated, apparently by a Buddhist hermit, in 842.