Indians entered america approx 8000 years ago. Many were nomadic hunter/gathering cultures, which have no defined territory. They followed animal herds, etc., so a map of their area is very approximate at best.
Recently the oldest skeleton was found, and it was caucasian! Caused quite a stir.
Remember that humans have been around for millions of years, and traveled in groups of around 200 people for most of that time. Organization came much later.
There is no evidence Native Americans originated from the Caucasus regions. We have remains that have been dated to as far back as 12,707–12,556 years BP. Accordingly:
> Paleogenomic analysis of the remains revealed Siberian ancestry and a close genetic relationship to modern Native Americans, including those of Central and South America.[1][3] These findings support the hypothesis that modern Native Americans are descended from Asian populations who crossed Beringia between 32,000 and 18,000 years ago.
Recently the oldest skeleton was found, and it was caucasian! Caused quite a stir.
Remember that humans have been around for millions of years, and traveled in groups of around 200 people for most of that time. Organization came much later.