Statistics for occurrence #1 of “Ohio” in chapter 45 of Admiral David D. Porter, The Naval History of the Civil War.:

...States, was open to the raids of the Confederates, and they seemed loath to abandon it altogether, hoping still to obtain possession of it and carry the war into the more northern States of Kentucky, Ohio and Missouri. It was a vain hope, however, and one not justified by the position or condition of the Federal armies. In February, 1864, Lieutenant-Commander LeRoy Fitch still commanded a fleet ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Ohio (Ohio, United States) 4,328 16 10 0 0 user votes
Ohio (United States) 1,611 14 1 0 0 user votes
Ohio (Colorado, United States) 12 0 0 0 0 user votes
Ohio (Illinois, United States) 0 0 0 0 0 user votes
Ohio (Missouri, United States) 0 0 0 0 0 user votes
Ohio (New York, United States) 0 0 0 0 0 user votes
Ohio (Texas, United States) 0 0 0 0 0 user votes

† 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.