One of the earliest mentions of the Oirat people in a historical text can be found in The Secret History of the Mongols the 13th century chronicle of Genghis Khan s rise to power In the Secret History the Oirats are counted among the forest people and are said to live under the rule of a shaman chief known as bäki They lived in Tuva and Mongolian Khövsgöl Province and the Oirats moved