
Fort Donelson National Battlefield : “No terms except an unconditional and immediate surrender can be accepted.” Ulysses S. Grant, 1862

Cairo, Illinois: the confluence of the Ohio and Mississippi rivers and 3 states: Kentucky, Illinois, Missouri.

A transportation corridor: We saw a barge transporting a rocket going up Tennessee river to Ohio river, then down the Mississippi to port of New Orleans and then onto Kennedy Space Center.

What is the Third Principle Meridian? a longitude reference line running true north from the point of confluence of the Ohio and Mississippi Rivers.

The New Madrid earthquakes were some of the biggest earthquakes in American history, felt all the way on the East Coast.