Statistics for occurrence #1 of “Po River” in chapter 1.39 of Southern Historical Society Papers, Volume 25.:

... Courthouse. On the 10th Heth's and Anderson's divisions, commanded by Early, had a serious conflict with a portion of Grant's army, which was attempting to flank General Lee by what was called the Po River road. In this engagement the 44th suffered severely and fought with its accustomed valor. Captain J. J. Crump, of Co. E, elicited by his conduct warm commendation from the General commanding. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Po River (Virginia, United States) 305 2 21 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.