Rouran Khaganate
The proto-Mongols formed various tribal kingdoms that fought against each other for supremacy, such as the Rouran Khaganate (330–555) until it was defeated by the Göktürks, who founded the First Turkic Khaganate (552–744), which in turn was subdued by the growing strength of the Chinese Tang dynasty. The destruction of the Uyghur Khaganate (744–848) by the Yenisei Kyrgyz resulted in the end of Turkic dominance in Mongolia.