The external expansion of the Tang Dynasty

Good ... In fact, the Tang Dynasty kept expanding ... until the Anshi Rebellion, the Sui Dynasty was vast, and Tanggang was not strong enough to be controlled by Turks, but it was destroyed when it became strong. East Turkey repelled West Turkey (Hehe), Tubo fought against the Khitan cymbals, and then opened up the western regions, established the Anxi Festival, expanded to Central Asia, established the Persian commander-in-chief, and destroyed Baekje Koguryo on the Korean Peninsula ... unprecedented. Countries that are also great empires, such as Dashi, fought the battle of Luo Heng, or fought for the territory of Central Asia ... Although they lost, in short, apart from Yuan and Tang Dynasties, they may have the largest territory (I don't know). Like Li Bai's birthplace, Broken Leaf was once one of the four towns in Anxi, and there were troops stationed in the Tang Dynasty ... As for the open culture, it was nothing ... Although the culture was strong, the military strength of the Tang Dynasty was already very strong before the Arab Empire entered Central Asia! How did the territory come from? It is calling! Didn't the Tang Dynasty set up our army in order to expand the military town system in the frontier fortress? Unfortunately, the expansion of the military town system wiped out Tang himself. This may be wrong. ...