Statistics for occurrence #1 of “Headquarters” in chapter 17 of Alfred Roman, The military operations of General Beauregard in the war between the states, 1861 to 1865:

...ral Beauregard's telegram to the President, and, though he doubted General E. Kirby Smith's willingness to respond to the emergency, had, however, authorized the call upon him. But his reply reached Headquarters after General Beauregard's departure from Montgomery. When the War Department was apprised of the fact the following telegram was forwarded to Lieutenant-General Taylor: Meridian, Dec. 14th...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Headquarters (Washington, United States) 1,024 466 0 0 0 user votes
Headquarters (New Jersey, United States) 132 124 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.