As Songtsen Gampo's only son had died early, he was succeeded by his infant grandson Mangsong Mangsten.
[3] 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.
[6] Between 665 and 670 Khotan was defeated by the Tibetans, and a long string of conflicts ensued with the Chinese Tang dynasty.
In the spring of 670, Tibet attacked the remaining Chinese territories in the western Tarim Basin (see Battle of Dafei River).
Due to his young age he was enthroned with the minister Gar Tongtsen's second son, Khri-'bring, to act as regent.