recorded an armed conflict between the Be-ča-nag and the Hor (Uyghurs or Oghuz Turks) peoples in the region of the river Syr Darya. The Pecheneg tribes were possibly related to the Kangly. In the late 9th century, conflict with the Khazars drove the Pechenegs into the Pontic steppes. In the 10th century, they had substantial interactions with the Byzantine Empire, who depended on them for keeping control of their neighbors. Byzantine and Muslim sources confirm that the Pechenegs had a leader, but the position was not passed down from father to son. In the 10th century, the Pechenegs came into military conflict with the Rus', and in the early 11th century, military conflict with the Oghuz Turks drove them further west across the Danube into Byzantine territory. Uyghur wave (8th-9th c.) Oghuz The Oghuz Turks take their name from the Turkic word for 'clan', 'tribe', or 'kinship'. As such, Oghuz is a common appellation for many Turkic groups, such as the Toquz Oghuz (nine tribes), Sekiz Oghuz (eight tribes), and Uch Oghuz (three tribes). Oghuz has been used to refer to many different Turkic tribes, causing much confusion. For example, the ruler of the Oghuz was called the Toquz Khagan, even though there were twelve tribes instead of nine. It is uncertain if the Oghuz Turks were directly descended from the Toquz Oghuz. They may have been under the direct leadership of the Toquz at some point, but by the 11th century, the Oghuz were already linguistically distinct from their neighbors such as the Kipchaks and Karakhanids. Zuev (1960) connects the Oghuzes to the Western Turkic tribe (< MC *) mentioned in the Chinese encyclopedia Tongdian, as well as the 'Three ' (< MC *) in the 8th-century () 'Venus's Secret Classic' and the three hordes mentioned in Al-Masudi's Meadows of Gold and Mines of Gems. The Oghuz migration westward began with the fall of the Second Turkic Khaganate and the rise of the Uyghur Khaganate in 744. Under the Uyghur rule, the Oghuz leader obtained the title of "right yabgu". When they appeared in Muslim textual sources in the 9th century, they were described using the same title. The Oghuz fought a series of wars with the Pechenegs, Khalaj, Charuk, and Khazars for the steppes, emerging victorious and establishing the Oghuz Yabgu State. The Oghuz were in constant conflict with the Pechenegs and Khazars throughout the 10th century, as