What social, ethnic, environmental, and economic factors made the trans-mississippi west a unique region among the successive american frontiers? what makes the west continue to be a region quite distinctive from other regions such as the northeast, the midwest, and the south? how does the myth of the frontier west differ from the actual reality, in the late nineteenth century, and after?

The factors that made the Trans-Mississippi West unique are the social relation and the struggle of it between the white Anglo and Spanish people and the change of environment in the dry environment. Other factors include role of federal government in the economic and social growth and the presence of American Indians even after they got defeated.

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answer; /// i believe the correct answer is (oasis)