In 635 Yarkand (Shache) submitted to the Tang dynasty. In 632 the oasis kingdoms of Khotan (Yutian) and Shule (Kashgar) submitted to the Tang dynasty as vassals. Qi refers to the Gobi Desert while Xi refers to the west. The Western Regions during the Tang era were known as Qixi (磧西). See also: Timeline of the Tang dynasty 7th century The last five years of the protectorate are regarded as an uncertain period in its history, but most sources agree that the last vestiges of the protectorate and its garrisons were defeated by Tibetan forces by the year 790, ending nearly 150 years of Tang influence in Central Asia. Īfter the An Lushan Rebellion (755–763) was suppressed, the office of Protector General was given to Guo Xin, who defended the area and the four garrisons even after communication had been cut off from Chang'an by the Tibetan Empire. In 659, Sogdia, Ferghana, Tashkent, Bukhara, Samarkand, Balkh, Herat, Kashmir, the Pamirs, Tokharistan, and Kabul all submitted to the protectorate under Emperor Gaozong of Tang. The Four Garrisons of Anxi in Kucha, Khotan, Kashgar, and Karashahr were installed between 648 and 658 as garrisons under the western protectorate. The head office was first established at the prefecture of Xi, now known as Turpan, but was later shifted to Qiuci ( Kucha) and situated there for most of the period. 790) established by the Tang dynasty in 640 to control the Tarim Basin. The Protectorate General to Pacify the West ( Anxi Grand Protectorate), initially the Protectorate to Pacify the West ( Anxi Protectorate), was a protectorate (640 – c.

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