The End of Genghis Khan

During his last campaign with the Tangut Empire during which Genghis Khan was fighting with the Khwarezmid Empire , Genghis Khan died on August 18, 1227. The reason for his death is uncertain. Many assume he fell off his horse, due to old age and physical fatigue; some contemporary observers cited prophecies from his opponents. The Galician-Volhynian Chronicle alleges he was killed by the Tanguts. There are persistent folktales that a Tangut princess, to avenge her people and prevent her rape, castrated him with a knife hidden inside her and that he never recovered.
Genghis Khan asked to be buried without markings. After he died, his body was returned to Mongolia and presumably to his birthplace in Hentiy aymag, where many assume he is buried somewhere close to the Onon River. According to legend , the funeral escort killed anyone and anything across their path, to conceal where he was finally buried. The Genghis Khan Mausoleum is his memorial, but not his burial site. On October 6, 2004, “Genghis Khan’s palace” was allegedly discovered, and that may make it possible to find his burial site. 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 bit in the hiding the burial site. The burial site remains undiscovered.

Genghis Khan left behind an army of more than 129,000 men. 28,000 were given to his various brothers and his sons, and Tolui, his youngest son, inherited more than 100,000 men. This force contained the bulk of the elite Mongolian cavalry. This was done because by tradition, the youngest son inherits his father’s property. Jochi, Chagatai, Ogedei and Kulan’s son Gelejian received armies of 4000 men each. His mother and the descendants of his three brothers received 3000 men each. (From Wikipedia )