12th Illinois Volunteer Infantry Regiment (3 Month)

The 12th Regiment Illinois Volunteer Infantry Regiment (3 months) was an infantry regiment that served in the Union Army between May 2, 1861–August 1, 1861, during the American Civil War.

Service
The infantry regiment was organized at Springfield, Illinois and mustered in on May 2nd, 1861 for a three-month service. The regiment was transferred to Cairo, Illinois, for garrison duty until August, 1861. By the time the regiment was mustered out on August 1st, 1861, they had lost four to disease.