All the armies of Europe, Asia and Africa combined, with all the treasure of the earth (our own excepted) in their military chest; with a Buonaparte for a commander, could not by force, take a drink from the Ohio, or make a track on the Blue Ridge, in a trial of a thousand years.

Summary

This quote emphasizes the natural barriers and vastness of the American continent. It suggests that even the most powerful armies and leaders in the world would be unable to conquer or fully explore America's terrains such as the Ohio River or the Blue Ridge Mountains. It highlights the belief in the impenetrable strength and vastness of the American landscape, portraying it as a force that cannot be conquered or tamed by any military power.