Golden Horde acquired a Turkic identity. Jochi's inheritance was divided among his sons. His sons Orda and Batu founded the White Horde and the Blue Horde, respectively, and would later combine their territories into the Kipchak Khanate or Golden Horde. Another of Jochi's sons, Shiban, received territories that lay north of Batu and Orda's Ülüs. Genghis Khan had made Jochi responsible for the supervision and conduct of the community hunt. Hunting was essentially a large scale military exercise designed specifically for the training of the army. It frequently encompassed thousands of square kilometers of area, required the participation of several tumens and lasted anywhere between one and three months. Rules and procedure of the conduct of the military exercise were encoded in the Yassa. Certain incidents hint towards the fact that Jochi was of a kinder disposition than Genghis Khan, though the adjective “kind” must be interpreted by the standards of his times and milieu because Jochi had had his share of indulgence in massacres of civilians. On one occasion Jochi pleaded with his father to spare the life of a son of an enemy chief who had been taken captive and who happened to be a great archer. Jochi argued that such a great archer could be an asset to the Mongol army. Genghis Khan brushed aside this argument and had the captive executed. Genetic Evidence for Paternity In 2019, researchers uncovered genetic evidence supporting the claim that Jochi was Genghis Khan's first true-born son. Scientists found that the Lu clan of Northwestern China, which claimed descent from the sixth son of Genghis Khan Toghan, largely belonged to a Y-chromosomal haplogroup (C2b1a1b1-F1756) closely related to one frequently found in the Tore clan from Kazakhstan which claimed descent from Jochi with the time of divergence ~1000 years ago. This result could however, also arise by different avenues of shared paternity or by Y-chromosomal sharing between Chilger Bökh and Genghis Khan. Legacy Jochi's son Berke was among the earliest Mongols to convert to Islam. Among his other descendants were Öz Beg Khan, Tokhtamysh and Hacı I Giray. Under Jochi's son Batu, Mongol rule expanded to its westernmost limit, and the Golden Horde (Kipchak Khanate) was established to consolidate the Jochid ulus. Öz Beg Khan would later oversee the economic, military and political golden age of the Horde and presided over its Islamisation. The first mention about his mausoleum is found in