The Protectorate General to Pacify the West, Grand Protectorate General to Pacify the West, or Anxi Protectorate (640–790) was a Chinese outpost established by Tang Dynasty in 640 to control the regions of Tian Shan, the Pamir Mountains and the Tarim Basin. The head office was first established at the Chinese prefecture Xizhou, but was later shifted to Kucha and situated there for most of the period. The Four Garrisons of Anxi were later installed to consort the military government.