Statistics for occurrence #1 of “Headquarters” in chapter 127 of Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 2.:

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Headquarters , army of Potomac, Manassas, July 23, 1861. Colonel:--Mr. George Johnson, special agent of the Quartermaster's Department, is sent to Loudon county for the purpose of collecting wagons, teams, and...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Headquarters (Washington, United States) 1,024 64 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.