Statistics for occurrence #1 of “Springfield, Ill.” in chapter 11, regiment IL12, section c.11.23 of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

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Organized at Springfield, Ill. , and mustered in for three months service May 2, 1861. Moved to Cairo, Ill., and garrison duty there till August. Mustered out August 1, 1861. Lost 4 by disease during service.
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