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French explorer Rene-Robert Cavelier Sieur de la Salle,reaches Ohio.
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French and Indian war begians.
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This is when Ohio becomes a state.
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Columbus becomes the state capital.
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At least 40,000 people escaped slavery on the Underground Railroad through Ohio.
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Cleveland's African Amercain population rises to 72,000.
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The St.Lawrence Seaway opens.
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Many of Ohio's Big steel Mills shut down.