Statistics for occurrence #1 of “Arkansas” in entry arkansas-the of Harper's Encyclopedia of United States History:

... Queen of the West. Again the attempt was unsuccessful. After the repulse of the Confederates at Baton Rouge, early in August, Porter, with the Essex and two other gunboats, went in search of the Arkansas , and found her 5 miles above that city. A sharp engagement ensued. the Arkansas became unmanageable, when her crew ran her against the river-bank, set her on fire, and she was blown up.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Arkansas (Arkansas, United States) 8,997 310 1 0 0 user votes
Arkansas (United States) 698 66 0 0 0 user votes
Arkansas (Kentucky, United States) 2 0 0 0 0 user votes
Arkansas (West Virginia, United States) 2 2 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.