 Initially, Noyon was a term for the chief of a Mongolian nomad community who, in times of war, had the function as a military commander in the army of Genghis Khan.The term ""Noyon"" applied to leaders of "Tumens" and "Mingghans", social-military units of 10,000 and 1,000 households respectively, each of them with one recruitable soldier.During conquests, "Noyons" used to receive territories for administration and they effectively became aristocracy, into the 20th century.