11th Illinois Infantry Regiment

The 11th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War. It was originally formed as a three-month volunteer unit at the beginning of the war, and then reorganized as a three-year unit, in which role it served until the end of the war.

Service
The original 11th Illinois Infantry was mustered into Federal service at Springfield, Illinois, mustered into Federal service on April 30, 1861, for a three-month enlistment.

The regiment remained in garrison at Cairo, Illinois, and was mustered out on July 30, 1861.

Total strength and casualties
The regiment suffered 10 enlisted men who died of disease, for a total of 10 fatalities.

Commanders

 * Colonel William H. L. Wallace

Service
The reorganized 11th Illinois Infantry was mustered into Federal service for a three-year enlistment on July 30, 1861, at Cairo, Illinois. It saw service at the Battle of Fort Donelson, where over 60% of those engaged were wounded, missing or killed; the Battle of Shiloh; the Battle of Vicksburg; and the Yazoo River Expedition, among other operations.

The regiment was mustered out on July 14, 1865.

Total strength and casualties
When the regiment was re-mustered in as a three-year regiment aggregate strength was 288, raised to 801 by November through recruiting. On April 23, 1863, the 109th Illinois Volunteer Infantry Regiment was incorporated into the 11th, adding 589 men. The regiment suffered 7 officers and 179 enlisted men killed in action or mortally wounded and 1 officer and 284 enlisted men who died of disease, for a total of 471 fatalities.

Commanders

 * Colonel W.H.L. Wallace - promoted to brigadier general on July 30, 1861.
 * Colonel Thomas E.G. Ransom - promoted to brigadier general on April 2, 1862.
 * Colonel Garrett Nevins - killed in action near Vicksburg on April 23, 1863.
 * Colonel James H. Coates - mustered out with the regiment.