Statistics for occurrence #1 of “Arkansas” in chapter 31 of Admiral David D. Porter, The Naval History of the Civil War.:

...y built no more forts along the banks of the great river; to guarantee a safe passage to army transports and commercial steamers, and to see that no provisions or troops reached the Confederates from Arkansas , Louisiana or Texas. These duties were faithfully performed. The tin-clads and gun-boats, now amounting to about 112, were spread along the whole length of the river (below Vicksburg) and at or...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Arkansas (Arkansas, United States) 8,997 64 1 0 0 user votes
Arkansas (United States) 698 10 0 0 0 user votes
Arkansas (Kentucky, United States) 2 0 0 0 0 user votes
Arkansas (West Virginia, United States) 2 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.