History 430: Theory and Practice
There were once unsettled and wild lands in the Indian territory of northwest Oklahoma, in the lowland valleys of southeastern Kansas, and even the vast hills of the southwestern Ozrks of Missouri. But this once clean and tranquil land is no more due to the mining and encampment of the Tri-State area of Kansas, Missouri, and Oklahoma. In the late nineteenth century and early twentieth century, there was a large movement of people into the Tri-State area. This was a result of new found minerals able to be mined, and with that came jobs, land, and new opportunity for the people of the Eastern United States. The time of ore mining in the Tri-State region gave the area its highest point and prosperity in its history, but this fell in the midst of one of our country's darkest hours into poverty.
Zdeb, Joey, "Depression and Decline in the Tri-States" (2011). Theory and Practice: Hist 430. 23.