African americans who settled in the plains region of the united states were known by what name?

 The correct answer is : Yes. They were known by the name of Exodusters.

Explanation:  After the Civil War there was a general exodus of blacks from the south to the west. These migrants were known as exodusters and the migration received the name of movement "Exoduster", some wanted to move north and others wanted to be part of the colonization movement in Liberia.