U.S. Geography

What Iowa fort was the first of its kind, built to protect one Native American group from another?

More Questions from U.S. Geography
Which of these US states does not border Mexico?
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Which U.S. state is appropriately named the "Pineapple State"?
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What Iowa monument is named for the only person known to die on the Lewis and Clark expedition?
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Which U.S. city is located in the northeastern USA?
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Which is not a Seattle neighborhood?
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What two Idaho towns were major stops on the Oregon Trail?
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Which U.S. state has Boundary Peak as its highest point and the Sagebrush as its flower?
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What is the state bird and state tree of Ohio?
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