The Yenisei Kyrgyz (Old Turkic: 𐰶𐰃𐰺𐰴𐰕:𐰉𐰆𐰑𐰣‎, romanized: Qïrqïz bodun; Chinese: 葉尼塞吉爾吉斯人), were an ancient Turkic people who dwelled along the upper Yenisei River in the southern portion of the Minusinsk Depression from the 3rd century BCE to the 13th century CE. The heart of their homeland was the forested Tannu-Ola mountain range (known in ancient times as the Lao or Kogmen mountains), in modern-day Tuva, just north of Mongolia. The Sayan mountains were also included in their territory at different times. The Kyrgyz Khaganate existed from 550 to 1219 CE; in 840, it took over the leadership of the Turkic Khaganate from the Uyghurs, expanding the state from the Yenisei territories into the Central Asia and the Tarim Basin. The Yenisei Kyrgyz mass migration to the Jeti-su resulted i