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Louis Joliet and Jacques Marquette visit Iowa. http://www.ducksters.com/geography/us_states/iowa_history.php
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Dubuque is first permanent settlement.
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Iowa becomes part of the United States.
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Lewis and Clark explored through Iowa on their way to the Pacific Ocean.
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Iowa becomes its own territory, separate from Missouri.
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Iowa is admitted into the Union.
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Des Moines becomes the capital city of Iowa.