When a problem arises with the Navajo nation, whose territory crosses state boundaries, the Federal Bureau of Indian Affairs would help.
The Bureau of Indian Affairs is a federal government agency charged with managing the native territories and the resources that are granted to these groups, whose main officer is Bryan C. RIce. It is an organism dependent on the Department of the Interior, and is in charge of procuring through the administration of the territory and the resources the well-being of the natives lodged in lands granted by the federal government. Therefore, in the event of structural problems that transcend the Navajo Nation's sphere of influence, this agency would be the first to act.
Writ of habeas corpus allows people who are falsely imprisoned to fight the case. One example would be falsely accused crimes. A lot of people are in the wrong place at the wrong time and get jailed for others mistakes so it offers them a second chance to defend themselves.
The cold war was a series of contracts between the US (United states) and USSR (Russia back then) but there were no ongoing hostilities which is were it got it's name... THE COLD WAR! =D