The Xianbei were an ancient nomadic people who inhabited parts of present-day northeastern China, Inner Mongolia, and the eastern Eurasian steppe. The Xianbei were likely not of a single ethnicity, but rather a multilingual, multi-ethnic confederation consisting of mainly Proto-Mongols, and, to a minor degree, Tungusic and Turkic peoples. They originated from the Donghu people who splintered into the Wuhuan and Xianbei when they were defeated by the Xiongnu at the end of the 3rd century BC. In the 1st century BC, the Xianbei began engaging in the conflict between the Han dynasty and the Xiongnu, culminating in the Xianbei replacing the Xiongnu on the Mongolian Plateau.