Statistics for occurrence #1 of “Cairo, Ill.” in chapter 21, regiment MN3 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

... from Fort Snelling to relief of Fort Abercrombie on Red River September 11-October 5, then joined Regiment at Camp Release. Duty at Fort Snelling reorganizing till January 16, 1863. Moved to Cairo, Ill. , January 16-26, 1863, thence to Columbus, Ky., February 3, and duty there till March 12. Expedition to Fort Heiman March 12-14. Duty at Fort Heiman and operations against guerrillas till June...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Cairo, Ill. (Illinois, United States) 3,037 192 289 150 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.