Temujin forbade looting of his enemies without permission, and implemented a policy of sharing spoils with the Mongol warriors and their families, instead of giving all to the aristocrats. He thus held the Khan title. These policies brought him into conflict with his uncles, who were also legitimate heirs to the throne; they regarded Temujin not as leader but merely an insolent usurper. This controversy spread to his generals and other associates, and some Mongols who had previously been allies with him broke their allegiance.
War ensued, and Temujin and the forces still loyal to him prevailed, and from 1203–1205 destroyed all the remaining rival tribes and brought them under his sway. In 1206, Temujin was crowned as the Khaghan of the Yekhe Mongol Ulus (Great Mongol Nation) 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, and marked the start of the Mongol Empire.
Genghis Khan innovated many ways of organizing his army, dividing it into decimal subsections of arbans (10 people), zuuns (100), myangans (1000) and tumens (10,000). The Kheshig or the Imperial Guard was founded and divided into day (khorchin, torghuds) and night guards (khevtuul). He rewarded those who had been loyal to him and placed them in high positions, placing them as heads of army units and households, even though many of his allies had been from very low-rank clans.
Compared to the units he gave to his loyal companions, those assigned to his own family members were quite few. He proclaimed a new law of the empire, Ikh Zasag or Yassa, and codified everything related to the everyday life and political affairs of the nomads at the time. He forbade the selling of women, theft of other's properties, fighting between the Mongols, and the hunting of animals during the breeding season.
He appointed his adopted brother Shigi-Khuthugh supreme judge (jarughachi), ordering him to keep records of the empire. In