Statistics for occurrence #1 of “Unionists” in year 1861, month August, day 19 of Rebellion Record: a Diary of American Events, Diary from December 17, 1860 - April 30, 1864:

...hundred and forty fugitives enlisted in the United States service at Camp Dick Robinson, in Kentucky.--Louisville Journal. The office of the Sentinel at Easton, Pa., was destroyed by a crowd of Unionists .--Philadelphia Press, August 20. The town of Commerce, Mo., forty miles from Cairo, Ill., which was taken by a battery planted by the secessionists, was retaken by five hundred troops sent down...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Unionists 665 40 1 0 0 user votes
Baltimore Unionists 84 0 0 0 0 user votes
Virginia Unionists 28 0 0 0 0 user votes
Theeast Tennessee Unionists 22 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.