Statistics for occurrence #1 of “St. Louis” in chapter 198 of Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 7.:

...t one thousand six hundred. I am, very truly, your obedient servant, E. B. Brown, Brigadier-General Volunteers, Commanding. To Major-General J. M. Schofield, Commanding Department of the Missouri, St. Louis .
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† St. Louis (Missouri, United States) 2,551 20 591 2 0 user votes
St. Louis (Michigan, United States) 4 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.