 The western kingdom of Zhangzhung revolted soon after the death of King Mangsong Mangtsen (also known as Trimang Löntsen, , 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.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 on the Min River north of Chengdu which they held for more than sixty years as a frontier post.