Answer:
Nomadic people (or nomads) are people who move from one place to another, instead of living in one place. The best known examples in Europe are gypsies, Roma, Sinti, and Irish travelers. Many other ethnic groups and communities are traditionally nomadic; such as Berbers, Kazakhs, and Bedouin.
They started using billboards i believe hope that helps
It was the anti-westward movment forbidding all settlers to cross the appalachian mountains.