Statistics for occurrence #1 of “Rosecrans” in chapter 3 of Colonel Charles E. Hooker, Confederate Military History, a library of Confederate States Military History: Volume 12.2, Mississippi:

...hed to the command of General Floyd, in western Virginia, and shared the frightful sufferings of the forces under Gen. R. E. Lee at Sewell Mountain during the autumn, but on account of the retreat of Rosecrans from their front did not engage in battle.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Rosecrans 3,669 54 499 0 0 user votes
W. S. Rosecrans 2,646 0 20 0 0 user votes
William S. Rosecrans 1,943 0 23 0 0 user votes
William Starke Rosecrans 117 0 9 0 0 user votes
Gen Rosecrans 36 0 0 0 0 user votes
Corinth Rosecrans 22 0 0 0 0 user votes
Sunday Rosecrans 22 0 0 0 0 user votes
Frank Rosecrans 18 0 0 0 0 user votes
S. Rosecrans 16 0 0 0 0 user votes
H. S. Rosecrans 15 0 1 0 0 user votes
Major-Generai Rosecrans 14 0 0 0 0 user votes
Lager B. Rosecrans 4 0 0 0 0 user votes
William T. Rosecrans 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.