In 783 Tibetan armies overran Chang*an (present day Xi*an), the Chinese capital, forcing the Chinese to conclude a treaty that recognised new borders incorporating most of the Tibetan conquests.
In 783 Tibetan armies overran Chang*an (present day Xi*an), the Chinese capital, forcing the Chinese to conclude a treaty that recognised new borders incorporating most of the Tibetan conquests.
783年，西藏军队占领了唐都长安（今西安），强迫中国签订一份承认其侵占的大部分土地的条约。