The conquest of the Western Turks, known as the Western Tujue in Chinese sources, was a military campaign in 657 led by the Tang Dynasty general Su Dingfang against the Western Turkic Khaganate ruled by Ashina Helu.
In 607, he offended Emperor Wen's son Emperor Yang of Sui (Yang Guang) by criticizing Emperor Yang's large rewards to Tujue's submissive Qimin Khan and was executed by Emperor Yang.
The Tang campaigns against the Western Turks, known as the Western Tujue in Chinese sources, were a series of military campaigns conducted during the Tang Dynasty against the Western Turkic Khaganate in the 7th century CE.
Around the near year 556, after Tujue's Mugan Khan Ashina Qijin thoroughly crushed Rouran's last khan Yujiulü Dengshuzi, Yujiulü Dengshuzi fled to Western Wei.