Statistics for occurrence #1 of “U. S. A.” in chapter 3.13 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: Volume 2.:

... U. S. A.
George H. Pettis, Brevet Capt., U. S. V., late Lieutenant commanding Company K 1st California Infantry, and Lieutenant and Adju...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† 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.