Those are not made up nations. Those are Native American Tribes, which, if I am not incorrect, are officially independent nations. There is no way to remove them. Also, they are not weird.
For example: http://www.fortpecktribes.org/
Those are not made up nations. Those are Native American Tribes, which, if I am not incorrect, are officially independent nations. There is no way to remove them. Also, they are not weird.
For example: http://www.fortpecktribes.org/