Statistics for occurrence #1 of “Dec” in year 1861, month December, day 24 of Rebellion Record: a Diary of American Events, Diary from December 17, 1860 - April 30, 1864:

...-N. Y. Herald, Dec. 30. The Thirty-fifth regiment of Indiana volunteers, under the command of Colonel John C. Walker, left Jeffersonville, for active service in Kentucky.--Indianapolis Journal, Dec . 26.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Dec 638 130 6 0 0 user votes
Nov Dec 390 0 0 0 0 user votes
M. O. Dec 26 0 0 0 0 user votes
John O. Dec 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.