Statistics for occurrence #1 of “Headquarters” in chapter 18 of Adam Badeau, Military history of Ulysses S. Grant from April 1861 to April 1865. Volume 2:

...nn5,029 —— Total174,223 Adjutant-General's office, January 3, 1881 War Department, Adjutant-General's office, Washington. July 29, 1868. Brevet Brigadier-General Adam Badeau, Headquarters , Armies of the United States, A. D. C. Washington, D. C.: General: In reply to your communication, of the 24th instant, I have to furnish you the following information, from the Records of Prison...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Headquarters (Washington, United States) 1,024 40 0 0 0 user votes
Headquarters (New Jersey, United States) 132 0 0 0 0 user votes
Headquarters (Kentucky, United States) 84 0 0 0 0 user votes
Headquarters (Arizona, United States) 2 0 0 0 0 user votes
Headquarters (Idaho, 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.