Statistics for occurrence #1 of “Fort Henry” in chapter 15 of Admiral David D. Porter, The Naval History of the Civil War.:

... To Flag-officer A. H. Foote, U. S. N., Commander U. S. Naval Forces, Western Waters. This letter explains the part taken by the Carondelet in the battle of Fort Donelson. After the capture of Fort Henry , Flag-officer Foote was requested by Generals Halleck and Grant to co-operate with the latter in an attack on Fort Donelson, situated on the west bank of the Cumberland river, near the town of Dover....
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Fort Henry (Tennessee, United States) 2,037 112 79 0 0 user votes
Fort Henry (Missouri, 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.