Statistics for occurrence #1 of “Headquarters” in chapter 26, page 664 of Alfred Roman, The military operations of General Beauregard in the war between the states, 1861 to 1865:

...idge should be well guarded on both sides—especially on south side now. G. T. Beauregard. Inform Generals Ferguson and Johnson of enclosed news. G. T. Beauregard. Headquarters , Greensboroa, N. C., April 12th, 1865. The aid of your cavalry will be required in executing the order communicated to Brigadier-General Walker this morning, which is now repeated for your instr...
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.