Organization of the Mongol Empire under Genghis Khan it also strengthened Mongol society as a whole. Genghis Khan’s united Mongol nation formed the foundation of the largest continuous land empire ever known. A wise statesman, Genghis also established Mongolian-style democracy that respected the ethnic and cultural diversity of his Empire. His government left many long-lasting legacies: Genghis Khan preferred to rule through existing hierarchies, but where he was resisted he destroyed the existing aristocracy. Nevertheless, he created at the same time a rough meritocracy among the Mongols. Positions of honor were given on the basis of bravery in battle or outstanding loyalty, as opposed to the old system
Mongol invasions of Tibet to station in Tibet in 1254-55 possibly to suppress war-like tribes in Tibet. Hulegu appointed his representative, Kokochu, in Tibet in mid-1250s while marching towards Iran. Since then, the Ilkhans had had possessions in Tibet. In 1265 Qongridar ravaged the Tufan/mDo-smad area, and from 1264 to 1275 several campaigns pacified the Tibetan and Yi peoples of Xifan around modern Xichang. By 1278 Mongol myriarchies: tumens and postroads reached through mDo-khams as far west as Litang. Tibet was subdued to the Mongol Empire under Mongolian administrative rule, but the region was granted with a degree of political autonomy. Kublai Khan would