The Chinese army led by Li Jingxuan were soundly defeated near Qinghai Lake,[3] however, and by the end of 677 Tibet controlled the whole of the Tarim Basin and the mountainous regions to the southwest.
[4] The western kingdom of Zhangzhung revolted soon after the death of King Mangsong Mangtsen (also known as Trimang Löntsen, Wylie: khri mang slon rtsan, r. 650–677), the son of Songtsen Gampo, but was brought back under Tibetan control by the "firm governance of the great leaders of the Mgar clan" the following year.
[4][5] Under the leadership of his powerful mother, Khri ma lod, and his ministers and generals during the early part of his reign, Tibet continued to maintain and even expand its territory.
The Tibetans gained control of an important Tang fortress at Anrong in 678[6] on the Min River north of Chengdu which they held for more than sixty years as a frontier post.
On the west they attacked and took over four military governments such as Guici (Kucha), Sule (Kashgar), and so forth, while to the north they extended as far as over 10,000 li to the Tujue (Turks) area.
Then he personally marched north and confronted Gar Trinring Tsendro, who surrendered without a fight and, according to the Old Book of Tang, committed suicide.
[17][19] 'Dus-srong he married two women from important Tibetan clans—'Dam-gyi Cog-ro-bza', and Chimza Tsunmotog (Wylie: mChims-bza' bTsan-ma Thog-thog-sten), Princess of Chim, with whom he had a son Khri-lde-gtsug-btsan (also known later as Mes-ag-thoms) in 704.
[21] Although 'Dus-srong is primarily remembered as a warrior, according to the Testament of Ba, he supported Buddhism and had a temple called Khri rtse built in Gling Khams, "and so on",[22] which is recorded on an inscription at sKarchung written by Emperor Sadnalegs about a century later.
The Tang Annals state he was on his way to suppress tributary kingdoms on the southern borders of Tibet, including Nepal and parts of India.
There was a dispute among his sons but, "after a long time" the people put seven year old Qilisuzan (Wylie: khri lde gtsug btsan), later known as Me Agtsom, on the throne.