Statistics for occurrence #1 of “St. Louis” in chapter 150, page 439 of Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 2.:

...ville, on the Arkansas border, there is said to be 1,000 secessionists, and at Camp Walker in the northwestern part of the State, 10,000, whose design is to retake Springfield, and from here march on St. Louis . Galway. --N. Y. Times, July 31.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
St. Louis (Missouri, United States) 2,551 73 591 5 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.