Statistics for occurrence #1 of “Gen. R. E. Lee” in chapter 7 of Col. O. M. Roberts, Confederate Military History, a library of Confederate States Military History: Volume 12.1, Alabama:

...en. R. E. Lee, 35,000; loss 1890 k, 9770 w, 2304 m.—Federal, Gen. McClellan, 87,000; loss 2661 k, 11704 w, 13491 m. Alabama troops, same as at Antietam. Shepherdstown, Va.. Sept. 19-20. Gen. R. E. Lee .—Federal, Gen. F. J. Porter, 2 brigades; loss 71 k, 161 w, 131 m. Alabama troops, same as at Antietam. Fredericksburg, Dec. 13. Gen. R. E. Lee, 20,000; loss 608 k, 4116 w, 653 m.—...
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.