About the Dakotas...Sorry I got my Dakotas mixed up there really should just be Dakota as not much difference between them.
My wife and I are in the process of visiting all 50 state capitols. In my research, I have learned the history of many of our states. One reason the Dakota Territory was split was that the Republicans gained four senators (rather than two) in Washington when the two states were created. But two regions of this huge land mass were actually functioning somewhat independently at the time statehood was granted.
North Dakota was still "wild country" in the 1880s and had established trade routes mainly with Minneapolis and St Paul. South Dakota considered themselves much more civilized and generally traded along the Missouri River to Kansas City and St. Louis.
Sorry for history lecture.