Statistics for occurrence #1 of “Ohio River” in chapter 61 of Admiral David D. Porter, The Naval History of the Civil War.:

... barred the way to New Orleans; the guns of the Navy opened the gates and laid New Orleans captive at the conqueror's feet. Then came the demand that the Navy should open the Mississippi from the Ohio River to the sea, clear out the obstructions in the shape of four hundred guns, and restore the different towns on the banks of that great river to the control of the United States Government. With what ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.