Statistics for occurrence #1 of “Keokuk” in chapter 5, page 90 of Daniel Ammen, Confederate Military History, a library of Confederate States Military History: Volume 7.2, The Atlantic Coast:

... Nahant, Patapsco, and Catskill left Port Royal under tow for North Edisto Inlet—an excellent harbor within twenty miles of Charleston Bar. The repairs and fitments of the Passaic, Montauk, and Keokuk detained them until the 1st of April, when they also proceeded to North Edisto, where they had been preceded by the Nantucket—another monitor which had arrived from the North on the 13th of Mar...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Keokuk (Iowa, United States) 1 0 1 0 0 user votes
Keokuk (Missouri, United States) 0 0 0 0 0 user votes
Keokuk (Texas, 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.