The area became a battleground when France and Britain fought for control in the 1750s .
Eventually French and British explorers encountered the strategic confluence where the Allegheny and Monongahela Rivers meet to form the Ohio , which leads to the Mississippi River .
The area became a battleground when France and British fought for control in the 1750s .
Eventually French and British explorers encountered the strategic confluence where the Allegheny and Monongahela Rivers meet to form the Ohio , which leads to the Mississippi River .