Statistics for occurrence #1 of “Columbus, Ohio” in chapter 32, regiment OH12, section c.32.154 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

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Organized at Camp Jackson, Columbus, Ohio , April and May, 1861. Moved to Camp Dennison, Ohio, May 6, and duty there till June 28. Reorganized for three years June 28, 1861. Three months men mustered out July 25, 1861.
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