Silk Roads in the context of "Langdarma"

Darma U Dum Tsen (Tibetan: དར་མ་འུ་དུམ་བཙན, Wylie: dar ma 'u dum btsan), better known as Langdarma (Tibetan: གླང་དར་མ།, Wylie: glang dar ma, THL: Lang Darma, lit. "Mature Bull" or "Darma the Bull"), was the 41st and last king of the Tibetan Empire who in 838 killed his brother, King Ralpachen, then reigned from 841 to 842 CE before he himself was assassinated. His reign led to the dissolution of the Tibetan Empire, which had extended beyond the Tibetan Plateau to include the Silk Roads with the Tibetan imperial manuscript center at Sachu (Dunhuang), and neighbouring regions in China, East Turkestan, Afghanistan, and India. Langdarma was assassinated by Lhalung Pelgyi Dorje on year 842.