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

...rginia lying between the Blue Ridge and Chesapeake Bay, could be added to Maryland, and that portion of the peninsula between the Chesapeake and the Atlantic, could be incorporated into the States of Delaware .
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Delaware (Delaware, United States) 2,552 58 0 0 0 user votes
Delaware (Ohio, United States) 15 0 1 0 0 user votes
Delaware (Arkansas, United States) 4 0 0 0 0 user votes
Delaware (Canada) 0 0 0 0 0 user votes
Delaware (Indiana, United States) 0 0 0 0 0 user votes
Delaware (Iowa, United States) 0 0 0 0 0 user votes
Delaware (Kentucky, United States) 0 0 0 0 0 user votes
Delaware (Louisiana, United States) 0 0 0 0 0 user votes
Delaware (Michigan, United States) 0 0 0 0 0 user votes
Delaware (Missouri, United States) 0 0 0 0 0 user votes
Delaware (New Jersey, United States) 0 0 0 0 0 user votes
Delaware (New Mexico, United States) 0 0 0 0 0 user votes
Delaware (Oklahoma, United States) 0 0 0 0 0 user votes
Delaware (Pennsylvania, United States) 0 0 0 0 0 user votes
Delaware (Virginia, 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.