Statistics for occurrence #1 of “Headquarters” in part 12.41, chapter 12.51 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

...on the person of General W. H. L. Wallace, after he had received a mortal wound at Shiloh, and sent by his widow to General Grant [see foot-note, page 468; printed also in the Century and in the ]: Headquarters , Third Division, Adamsville, April 5th, 1862. General W. H. L. Wallace, commanding Second Division. Sir: Yours received. Glad to hear from you. My cavalry from this point has been to and from y...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Headquarters (Washington, United States) 1,024 4 0 0 0 user votes
Headquarters (New Jersey, United States) 132 0 0 0 0 user votes
Headquarters (Kentucky, United States) 84 2 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.