During the Sui Dynasty, the Turks were once severely attacked by the Sui army. At the end of the Sui Dynasty, the Central Plains was divided and broken, with great losses, and the Turks recovered. During the reign of Tang Gaozu, the national strength of the Tang Dynasty was difficult to fight against the Turks, who were in a state of prosperity. Therefore, the Turks at that time humiliated the Tang Dynasty. Tang Gaozu had to pay tribute to the Turks, and Jieli Khan even attacked the capital Chang'an twice, forcing Emperor Taizong to ride alone to make an alliance and pay tribute every year.

Because of the Turkic attacks and harassment, the Tang Dynasty once considered moving the capital. After Tang Taizong, a hardcore hawk, ascended the throne, he no longer wanted to succumb to external oppression. Thus the Tang Dynasty began a hundred years of fierce border expansion, with the result that the total area of China's territory and subjects reached a historic peak.

The Tang Dynasty was one of the most high-spirited eras in Chinese history, and the frequency of frontier wars and victories in this seemingly prosperous dynasty was very rare in ancient Chinese history. Therefore, only the Tang Dynasty could give birth to a special Biansai poetry school, and give birth to verses like "Every year the bones are buried in the wilderness". As for "the Han family is full of Yin Mountain, and if you don't send Hu'er to return the horse, you want to grow and serve the country, why should you be born into Yumen Pass?" "The desert is dark and dusty, and the red flag is half rolled out of the gate. The former army fought in Taohebei at night, and has reported that it has captured Gu Hun", "Qinghai Changyun Dark Snow Mountain, and the lonely city looks at Yumen Pass. Yellow sand wears gold armor in a hundred battles, and Loulan will not be returned if it is not broken", "Grape wine luminous cup, if you want to drink pipa, urge immediately." Drunk and lying on the battlefield, how many people came back to fight in ancient times? This kind of bold rhetoric, due to the atmosphere of martial arts and literature in later dynasties, has even become an absolute sound of the martial spirit of the Chinese in ancient history. Especially during the Zhenguan period, the Tang Empire attacked from all sides, and the golden iron horse swallowed thousands of miles like a tiger.