Genghis Khan asked to be buried without markings, according to the customs of his tribe. After he died, his body was returned to Mongolia and presumably to his birthplace in Khentii Aimag, where many assume he is buried somewhere close to the Onon River and the Burkhan Khaldun mountain (part of the Kentii mountain range). According to legend, the funeral escort killed anyone and anything across their path to conceal where he was finally buried. The Genghis Khan Mausoleum, constructed many years after his death, is his memorial, but not his burial site.
On October 6, 2004, a joint Japanese-Mongolian archaeological dig uncovered what is believed to be Genghis Khan's palace in rural Mongolia, which raises the possibility of actually locating the ruler's long-lost burial site.[17] Folklore says that a river was diverted over his grave to make it impossible to find (the same manner of burial of Sumerian King Gilgamesh of Uruk.) Other tales state that his grave was stampeded over by many horses, over which trees were then planted, and the permafrost also did its part in hiding the burial site.
Genghis Khan left behind an army of more than 129,000 men; 28,000 were given to his various brothers and his sons. Tolui, his youngest son, inherited more than 100,000 men. This force contained the bulk of the elite Mongolian cavalry. By tradition, the youngest son inherits his father's property. Jochi, Chagatai, Ögedei Khan, and Kulan's son Gelejian received armies of 4,000 men each. His mother and the descendants of his three brothers received 3,000 men each.