伊犁河
According to the Han Chronicles In 132BCE the Yuezhi were driven out of the Ili River valley by the Wusun. They fled south from the Ili river area, by-passed the urban civilization of the Dayuan in Ferghana, and re-settled north of the Oxus in Bactria, definitively cutting Dayuan from contact with the Greco-Bactrian kingdom. The Yuezhi would further expand southward into Bactria proper around 125 BCE, and then going on to form the Kushan Empire in the 1st century CE.