Too many people on this board don’t know or understand basic American history. Their ingnorance tends to show up in comments such as the nomad statement.
The Woodlands Culture of Eastern regions of North America maintained semi-permanent communities in some time periods. It was necessary to pursue this semi-nomadic lifestyle due to the incidence of disease when occupying the same tonsite long enough for the groundwater to become contaminated with typhus and the parasites and parasitical diseases to become established in the communities. The Missippian Culture was somewhat more permanent, but its cities probably succumbed in part due to such sanitary and epidemiological problems and limitations. The City of Rome was so unhealthy to live in it required a constant influx of eager citizens to keep the city from rapidly depopulating as the consequence of disease. The immunities which developed in the Old World populations due to this incidence of disease is why they survivedd while the New World populations could not.
I wouldn't have called them nomadic.