If you drive from Shiraz to Isfahan or if you travel between Isfahan and Ahwaz, you might see rows of small tents around which children play. These are the tents of the Qashqais (between Isfahan and Shiraz) and of the Bakhtiaris (between Isfahan and Ahwaz). The il is the highest level out of which a certain number of people carrying the same genealogy work. The people of the tribe speak the same language and share the same myths about the past of the tribe.
Often, for political reasons, a number of tribes cooperate and form a confederation. The confederation is placed under the leadership of an influential member of one of the tribes. This Supreme Chief of tribes is also called an Il-Khan. He settles the affairs of the tribes with the help of an Il-Beg or manager.
In order to save tribal uprisings, the Il-Khan is also recognized by the central government. In that case, in times of war, he sends a given number of young people from different tribes to serve in the national army.