Statistics for occurrence #1 of “Illinois” in chapter 8 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 9: Poetry and Eloquence.:

...e bore? Oh, say not that my boy disgraced The uniform that he wore!’ ‘I cannot tell,’ said the aged man, ‘And should have remarked before, That I was with Grant,—in Illinois ,— Some three years before the war.’ Then the farmer spake him never a word, But beat with his fist full sore That aged man, who had worked for Grant Some three years before the war. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Illinois (Illinois, United States) 6,200 4 0 0 0 user votes
Illinois (New Mexico, United States) 4 0 0 0 0 user votes
Illinois (Oregon, United States) 2 0 0 0 0 user votes
Illinois (Colorado, United States) 0 0 0 0 0 user votes
Illinois (Illinois, United States) 0 0 0 0 0 user votes
Illinois (New Mexico, 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.