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Tang dynasty Border Four towns in Ansi Sun Shang Tibetan Guo Xin Ansidō Gofu Meta sum Ruins of the Beiting Capital Protectorate Tang Xianzong
01-13
![The army forgotten by the Tang Dynasty, alone guarded the border pass for 40 years, and the veteran soldier died on the young grandson until the last man[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)
