The
Oguz Yabgu State (
Oguz il, meaning
Oguz Land,
Oguz Country, 750–1055) was a
Turkic state, founded by
Oguz Turks in 766, located geographically in an area between the coasts of the
Caspian and
Aral Seas. Oguz tribes occupied a vast territory in
Kazakhstan along the
Irgiz,
Yaik, Emba, and
Uil rivers, the Aral Sea area, the
Syr Darya valley, the foothills of the
Karatau Mountains in
Tien-Shan, and the
Chui River valley (see map). The Oguz political association developed in the 9th and 10th centuries in the basin of the middle and lower course of the Syr Darya and adjoining the modern western Kazakhstan steppes.