Statistics for occurrence #1 of “Ohio” in chapter 30 of Admiral David D. Porter, The Naval History of the Civil War.:

...r. attack on colored troops at Milliken's bend. attack on Helena, Arkansas, by General Price. defeat of the enemy owing to the fire of the gun-boat Lexington. the raid of General John Morgan into Ohio and Indiana, and the capture of his forces owing to the energy of Lieutenant-Commander Le Roy Fitch with his gun-boats. gallant conduct of Engineer Doughty in capturing two of the enemy's steamers. ...
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.