Statistics for occurrence #1 of “Rio” in article pos=5 of The Daily Dispatch: March 12, 1862., [Electronic resource]:

...ers. The only distinction between them and their leaders is, thus the leaders are for more defence; the people for aggression; the leaders for independence only; the people, from the Potomac to the Rio Grande, for liberty and for Vengeance.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Rio 376 2 0 0 0 user votes
M. A. F. Rio 6 0 0 0 0 user votes
Bonito Rio 2 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.