Han Chinese ethnic group after they were conquered by the Song dynasty. The Yenisei Kyrgyz allied with China to destroy the Uyghur Khaganate in the year 840 AD. From the Yenisei River, the Kyrgyz pushed south and eastward in to Xinjiang and the Orkhon Valley in central Mongolia, leaving much of the Uyghur civilization in ruins. Much of the Uyghur population relocated to the south in modern-day China, establishing kingdoms in Gansu and Turpan. Central Asia Kangar union (659–750) The Kangar Union (Qanghar Odaghu) was a Turkic state in the former territory of the Western Turkic Khaganate (the entire present-day state of Kazakhstan, without Zhetysu). The capital of the Kangar union was located in the Ulytau mountains. Among the Pechenegs, the Kangar formed the elite of the Pecheneg tribes. After being defeated by the Kipchaks, Oghuz Turks, and the Khazars, they migrated west and defeated Magyars, and after forming an alliance with the Bulgars, they defeated the Byzantine Army. The Pecheneg state was established by the 11th century and at its peak carried a population of over 2.5 million, composed of many different ethnic groups. The elite of the Kangar tribes are believed to have had an Iranian origin, and they likely spoke an Iranian language, while most of the Pecheneg population spoke a Turkic language, with a significant percentage speaking Hunno-Bulgar dialects. The Yatuks, a tribe within the Kangar state who could not accompany the Kangars as they migrated West, remained in the old lands, where they are known as the Kangly people, who are now part of the Uzbek, Kazakh, and Karakalpak tribes. Oghuz Yabgu State (766–1055) The Oguz Yabgu State (Oguz il, meaning "Oguz Land,", "Oguz Country")(750–1055) was a Turkic state, founded by Oghuz 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 Syr Darya basin. Iranian, Indian, Arabic, and Anatolian expansion Turkic peoples and related groups migrated west from present-day Northeastern China, Mongolia, Siberia and the Turkestan-region towards the Iranian plateau, South Asia, and Anatolia (modern Turkey) in many waves. The date of the initial expansion