Unbeknownst to most Americans, there is a sovereign nation living within the borders of the United States that is somewhat unaffiliated with the national U.S. government. Actually there are a number, but the largest of them and most recognized is the Navajo Nation.
The Navajo Nation is a territory that covers over 27,000 square miles of land in the southwestern part of the United States. They occupy the areas near the corner of 4 states but only occupying in 3 of them, Utah, Arizona, New Mexico. They contain their own government consisting of their own legislative house, executive branch, and judicial government. They have their own law enforcement, social services, health services, college, zoo, educational trusts, and economy.