Statistics for occurrence #1 of “Portsmouth Harbor” in chapter 27 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

..., and assigned to duty in the Defenses of Washington, D. C. Company A at Forts Slocum, Stevens, Totten, Sumner and Batteries Cameron, Parrott, Kendall and Vermont till November, 1864. Ordered to Portsmouth Harbor November 25, 1864. Company B at Forts Bunker Hill, Saratoga, Lincoln, Bayard, Gaines and Foote till February, 1865, when ordered to Portsmouth Harbor, N. H. Repulse of Early's attack on Wash...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Portsmouth Harbor (Maine, 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.