Statistics for occurrence #1 of “Rapidan” in chapter 9 of Joshua Lawrence Chamberlain, The Passing of the Armies: The Last Campaign of the Armies.:

...up went the poor old caps; out rang the cheers from manly hearts along the Fifth Corps column;one half the numbers, old and new together, that on this very day a year ago mustered on the banks of the Rapidan , their youthful forms resplendent as the onlooking sun. One half the corps had gone, passing the death-streams of all Virginia's rivers; two hundred miles of furrowed earth and the infinite of heaven...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Rapidan (Virginia, United States) 580 2 4 0 0 user votes
Rapidan (Louisiana, United States) 2 0 0 0 0 user votes
Rapidan (Minnesota, United States) 0 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.