Mongol Empire his generals and other associates, and some Mongols who had previously been allies broke their allegiance. War ensued, and Temujin and the forces still loyal to him prevailed, defeating the remaining rival tribes between 1203 and 1205 and bringing them under his sway. In 1206, Temujin was crowned as the khagan of the "Yekhe Mongol Ulus" (Great Mongol State) at a kurultai (general assembly/council). It was there that he assumed the title of Genghis Khan (universal leader) instead of one of the old tribal titles such as Gur Khan or Tayang Khan, marking the start of the Mongol Empire. Genghis
Bayan of the Baarin and Nayagha's father Shirgügetü Ebügen, appear in the "Secret History of the Mongols". However, at least one well-respected scholar presents Bayan as a Turk whose family had long served the Great Khans. His grandfather Alagh was the viceroy in Khorazm province under the Mongol Empire. Bayan's father died during the Mongol siege of the stronghold of the Assassins ("Hashshashin"). While Bayan served in Persia with Hulegu's army, Kublai Khan recalled him. Kublai liked him, but he did not hold commanding rank in the Yuan army. After the success of the Battle of Xiangyang in 1273, Kublai appointed Bayan as the