The Mongolian Dzungar (also Zunghar; Mongolian: Зүүнгар Züüngar) was the collective identity of several Oirat tribes that formed and maintained one of the last nomadic empires, the Dzungar Khanate. The Dzungar Khanate covered the area called Dzungaria and stretched from the west end of the Great Wall of China to present-day eastern Kazakhstan, and from present-day northern Kyrgyzstan to southern Siberia. Most of this area was only renamed "Xinjiang" by the Chinese after the fall of the Dzungar Empire. It existed from the early 17th century to the mid-18th century.