Mongol Empire a son of a Mongol chieftain. As a young man he rose very rapidly by working with Toghrul Khan of the Kerait. The most powerful Mongol leader at the time was Kurtait; he was given the Chinese title "Wang", which means Prince. Temujin went to war with Wang Khan. After Temujin defeated Wang Khan he gave himself the name Genghis Khan. He then enlarged his Mongol state under himself and his kin. The term Mongol came to be used to refer to all Mongolic speaking tribes under the control of Genghis Khan. His most powerful allies were his father's friend,
Mongol invasions of Tibet in the late 1240s Mongolian prince Godan invited Sakya lama Sakya Pandita, who urged other leading Tibetan figures to submit to Mongol authority. This is generally considered to have marked the beginning of Mongol rule over Tibet, as well as the establishment of patron and priest relationship between Mongols and Tibetans. These relations were continued by Kublai Khan, who founded the Mongol Yuan dynasty and granted authority over whole Tibet to Drogon Chogyal Phagpa, nephew of Sakya Pandita. The Sakya-Mongol administrative system and Yuan administrative rule over the region lasted until the mid-14th century, when the Yuan dynasty began to