| The Optimum for Ohio History software presents an overview of Ohio’s history with an emphasis on history up to 1950. This history of Ohio has been divided into seven general eras:
Prehistoric (up to AD 1650)
Frontier (1669-1783)
Pioneer (1783-1814)
Growth (1811-1850)
Civil War (1850-1870)
Industrial (1865-1950)
Presidents & State Symbols (1841 and on)
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