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
What famous national park is mainly in Wyoming?
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New Jersey is the only state where all its counties are classified as what kind of area?
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How many acres does the Great Salt Lake cover?
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Who built a trading post in 1633 near what is now Hartford, CT?
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Where can you find Independence Rock?
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Which U.S. state's motto is the "Show Me State"?
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What is the only natural lake in the state of Texas?
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What worldwide retailer is based in Arkansas?
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