11.吐蕃雄霸高原_缩混

Tibetan Kingdom， the first unified and powerful regime on the Qinghai-Tibet Plateau， rose to prominence under King Songtsen Gampo in the 7th century. It expanded eastward and southward， reaching its peak when it occupied territories from葱岭 to Sichuan. However， internal strife and external pressures eventually led to the decline and fragmentation of the empire by the end of the Tang Dynasty.