Turkic history is the systematic documentation and study of events involving the Turkic peoples. Turks were an important political identity of Eurasia. They first appeared at Inner Eurasian steppes and migrated to many various regions (such as Central Asia, West Asia, Siberia, and Eastern Europe.) and participated in many local civilizations there. It is not yet known when, where, and how the Turks formed as a population identity. However, it is predicted that Proto-Turkic populations have inhabited regions that they could have the lifestyle of Eurasian equestrian pastoral nomadic culture. Türk was first used as a political identity in history during the Göktürk Khaganate period. The old Turkic script was invented by Göktürks as well. The ruling Ashina clan origins are disputed. Although there are debates about its inception, the history of the Turks is an important part of world history. The history of all people that emerged in Eurasia and North Africa has been affected by the movements of the Turks to some degree. Turks also played an important role in bringing Eastern cultures to the West and Western cultures to the East. Their own religion became the pioneer and defender of the foreign religions they adopted after Tengrism, and they helped their spread and development (Manichaeism, Judaism, Buddhism, Orthodox, Nestorian Christianity and Islam). 240 BC: Great Wall of China built to protect the nation against Inner Asian nomads. c. 202 BC: Xiongnu chanyu Modu conquered the Hunyu (渾庾), Qushe (屈射), Dingling (丁零), Gekun (鬲昆), and Xinli (薪犁); The Gekun and Xinli would later appear among the Turkic-speaking Tiele people, respectively, as Hegu and Xue. The Dingling were also proposed to be early Proto-Turkic people or ancestors of Tungusic speakers among the Shiwei. or related to Na-Dené and Yeniseian speakers, 395: Migration Period 461: sabir people around siberia 480: Pre-Bulgarians between the Caspian Sea and the Danube 540: The re-emergence of the lost Central Asian Turks mentioned in the Ergenekon epic 551: Establishment of the First Turkic Khaganate.