This state had been founded as a Mongolian state in the beginning; but it developed in the form of "Turkish- Mongolian Empire" in the following years. This state was called as the "Jenghiz Empire" in reference to its founder since it is nearly impossible to study the political, military and social events that took place in the 13th century apart from his character.
In the work titles as the Hidden History of the Mongolians dated 1240, the pedigree of Jenghiz (Genghis) Khan was explained with a relation to a grey wolf just like in the most ancient Turkish epics of their ancestors. It seems that these explanations support the rumours about his Turkish identity. In the course of the struggles that continued among the beys, Yesügey-bağatur kidnapped Höelün-ücin who was the wife of Yeke-Ciledu from Merkit people and this woman was the mother of Jenghiz afterwards. However, the Merkit people had poisoned Yesügey and killed him after 10 years. Yesügey and Höelün-ücin had four sons called as Temucin (born in 1155 or 1167?), Hasar, Haciun and Temulun and one daughter named as Temuge. Temucin had become an orphant at the age of 9 and his rivals tried to annihilate him. Temucin and his brothers were brought up under great difficulties by their mother.
Temucin had gained success in local wars and his supporters and friends had gradually increased. In the year of 1196, he was entitled with the title of "Jenghiz" and selected as "Khan" (Ha'an, Kagan) by some tribes limited in number. Among the persons who had pretended to be his friends in the beginning and who had then became his rivals and enemies were Kereyit Ruler, Onghan (To'oril=Tugrul) and Camuha from Cacirat people. However, Temucin was able to annihilate these people and his other rivals step by step. Pursuant to the integration of all the tribes, he was declared as the great khan with the renewed title of Jenghiz (Jenghis=Genghis) in the grand assembly that gathered around the spring of Onan river in the Leopard year of 1206. The establishment of the main empire and the great external expeditions started from that date on. The casags (casak, laws, rules) that arranged the administrative affairs of the state were accepted in this grand assembly; and the bilig (sayings, philosophy) of Jenghiz had been written in his period; but these works have not survived as a united text until nowadays.