query: When was the Mongolian Empire first founded?
passage: History of Mongolia
In 1206 Genghis Khan was able to unite and conquer the Mongols, forging them into a fighting force which went on to establish the largest contiguous empire in world history, the Mongol Empire (1206-1368). Buddhism in Mongolia began with the Yuan emperors' conversion to Tibetan Buddhism.
passage: Soviet occupation of Mongolia
As a result of the operation, Baron Ungern was captured and executed on 15 September 1921, the white Russian and Mongolian feudal troops were defeated, and the power of the Bogd Khanate of Mongolia was eliminated. A Provisional People's Government under the control of the Bolsheviks was established, which would become the Mongolian People's Republic in 1924.