Statistics for occurrence #1 of “Ohio” in part 4.9, chapter 4.10 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

...sual Democratic convention and celebration of the battle of New Orleans had taken place, and a series of resolutions had been passed, in which, professing to speak in the name of 200,000 Democrats of Ohio , the convention had very significantly intimated that this vast organization of men would be found in the way of any attempt to put down secession until the demands of the South in respect to slaver...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Ohio (Ohio, United States) 4,328 48 10 0 0 user votes
Ohio (United States) 1,611 18 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.