Collapse of Oguz Yabgu State and the Following Periods      

            
        In the period of the Yabgu State, the Oguz people were organised in two sections such as Üç-oklar (Three arrows) and Boz-ok (Grey Arrow). There are two lists about these Oguz tribes. One of them was given within DLT, the work of Kasgarli Mahmud titled as Divan-ı Lügat-it Turk (3rd quarter of the 11th century) and the other was given within the work of Reşid-üd-din titled as Cami-üt-tevarih (the first quarter of the 14th century). 22 tribes were shown within the work of DLT, Divan-ı Lügat-it Turk together with separate seals. Reşi-üd-din has increased the number of tribes to 24 and he had classified the Oguz people in two groups such as Boz-ok and Üç-ok. He had also identifed the "ongon" (totem) of each tribe in addition to the separate seals: The Oguz tribes included the Bok-ok tribes: Kayı, Bayat, Alka-evli (Alka Bölük), Kara-evli (Kar-bölük), Yazır, Döğer, Dodurga, Yaparlı, (not included within DLT), Afşar, Kızır (not included within DLT), Beğdili, Karkın (not included within DLT. Çaruklu is included in its place). Üç-Ok tribes: Bayındır, Peçene, Çavuldur, Çepni, Salur, Eymür, Alayuntlu, Yüreğir, İğdir, Büğdüz, Yıva (Iva), Kınık.

 

        Towards the year of 1000, the Oguz Yabgu State collapsed. It is considered that the state collapsed as a result of the disintegration of Seljuk family together with the crowded groups subject to them in addition to the pressure of Kipchak (Kuman) people, a branch of Kimek people that came into existence as a power in the 9th century.

 

        According to Kasgarli's map (in addition to the DLT), Kipchak people had invaded "Oguz steppe lands" and the lower section of the Seyhun River in the middle of the 11th century.

 

        Upon the collapse of the Yabgu State, a crowded group of Oguz people emigrated from the north of the Black Sea towards the west (Uz people). Another groups was oriented towards Cend region and then, to Khorasan (Seljuk people). It has been observed that the Oguz people who stayed in their lands resided in the region of Karacuk Mountains, in Mankışlak and in the towns located on the banks of Seyhun. It has also been observed that there were "Turks" in Cend and Karakum in the period of the Mongolian invasion.