I know our government used the word "sovereign nation". Let the cat out of the bag, North American Indian tribes were stone age tribes for I have looked up metal working and they did not have any... There was some copper in the Great Lakes, there was some Iron in the Northwest and there was no Metal Alloy work at all: like bronze...
If you like stone age society, loose network of tribes has the same modern definition "sovereign nation". The definition:
The supreme, absolute, and uncontrollable power by which an independent state is governed and from which all specific political powers are derived; the intentional independence of a state, combined with the right and power of regulating its internal affairs without foreign interference.
Here the are nations in name only with they came out talk to foreign powers... Native Peoples have Tribal Sovereignty not Nation Sovereignty...
https://www.paumatribe.com/government/tribal-sovereignty/
The Marshall trilogy, a series of three Supreme Court cases decided by Chief Justice John Marshall beginning in the 1830’s, set forth the legal framework for defining Tribal sovereignty. In defining tribal sovereign powers, Justice Marshall described tribes as “domestic dependent nations,” meaning that although tribes were “distinct independent political communities,” they remained subject to the paternalistic powers of the United States. Thus, Indian tribes possess internal governmental power over all affairs within the tribe, but lack external authorities to engage in relationships with foreign nations. It is important to note that state governments do not possess authority over tribes and the powers to “expand” or “contract” tribal sovereign authority rests solely within the power of the federal government. Thus, sovereignty also means that states are precluded from interfering with the tribes in their self-governance, while at the same time the United States congress reserves plenary power to change the scope and definition of tribal sovereignty.
Native Peoples Tribes are more like modern unions than nations...