
The borderlands of southern Iowa and northern Missouri are defined by a rhythmic series of south-flowing river valleys, notably the Chariton River and the Grand River. In the mid-1950s, this region remained a patchwork of small agricultural hubs connected by an extensive rail network, including the Chicago Burlington and Quincy and the Wabash lines. Larger regional centers like Centerville and Ottumwa serve as anchors in an area where the terrain transitions from the broader Grand River Valley in the west to the more dissected landscapes of the Des Moines River basin in the east.
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