Statistics for occurrence #1 of “St. John's River” in year 1864, month April of Rebellion Record: a Diary of American Events, Diary from December 17, 1860 - April 30, 1864:

...t a time when it was much needed, has been ordered on board the sloop-of-war Mahaska. He takes this opportunity to return his thanks to Captain G. B. Balch, commanding United States naval forces on St. John's River , for his kindness, and to Ensign Augustus E. French, and the petty officers and men under him, for their valuable services, very good conduct, and exhibition of excellent discipline, throughout their...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
St. John's River (Missouri, United States) 5 0 3 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.