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Jacques Marquette and Louis Jolliet explore Illinois
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Period: to
Illinois
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Great Britain gains control of Illinois
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Chicago is established
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Illinois becomes 21st state
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Illinois resident Abe Lincoln is elected president
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The Great Chicago Fire destroys most of the city
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The Sears Tower is finished
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Ronald Regan from Illinois is elected president
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Mississippi river floods millions of acres of Illinois farmland
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Illinois resident Barack Obama is elected president
