Nomads is the right answer.
Anyone who moves from one place to another rather residing in one place is called the nomads. There can be many reasons for the migration of the nomads such as herders change places because of the weather( that is not suitable for their animals). whereas, other nomads including that of the traders and merchants, travels move for exchanging of their goods.
I think this might be the answer not sure
Oklahoma served as a transportation corridor for their rival military and economic ventures.
This is because it was situated at the border, that is on the northern fringe of Spanish exploration of North America and on the western fringe of French exploration
