Ohio River

The Ohio River is a principal tributary of the Mississippi River, 1,579 km (981 mi) long in the eastern United States.

Related Topics:
Mississippi River - United States

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The Ohio River viewed from Liberty Hill in Ripley, Ohio.

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Of great significance in the history of North America dating from the time of the Native Americans, the river was a primary transportation route during the westward expansion of the early U.S. It flows through or along the border of six states, and its watershed encompasses 14 states, including many of the states of the southeastern U.S. through its largest tributary, the Tennessee. During the eighteenth century it was the southern boundary of the Northwest Territory, thus serving as the border between free and slave territory.

Related Topics:
North America - Native American - Tennessee - Northwest Territory

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