12th Illinois Infantry Regiment
The 12th Illinois Infantry Regiment, also known as the 1st Scotch Regiment, was an infantry regiment that served in the Union Army between May 2, 1861 and July 18, 1865, during the American Civil War. Service. Initial 3 month service. The infantry regiment was organized at Springfield, Illinois and mustered in on May 2, 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 1, 1861, they had lost four to disease. 3 year service. The 12th  Illinois Infantry was mustered into Federal service for a three-year enlistment on August 1, 1861, at Cairo, Illinois. The regiment was mustered out on July 18, 1865, at Camp Butler National Cemetery Camp Butler, Illinois. Total strength and casualties. The regiment suffered 5 officers and 143 enlisted men killed in action or mortally wounded and 3 officers and 109 enlisted men who died of disease, for a total of 260 fatalities.