9th Illinois Volunteer Infantry Regiment (3 Years)

The 9th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.

Service
The 9th Illinois Infantry was organized at Cairo, Illinois and mustered into Federal service between July 26 and August 31, 1861 for a three year enlistment.

The regiment was converted to the 9th Illinois Volunteer Mounted Infantry Regiment on March 15, 1863.

The regiment saw action at the Battle of Fort Donelson; the Battle of Shiloh, where the regiment suffered a 63% casualty rate; and the Second Battle of Corinth.

Total strength and casualties
The regiment suffered 5 officers and 211 enlisted men killed in action or mortally wounded and 1 officer and 200 enlisted men who died of disease, for a total of 417 fatalities.

Commanders

 * Colonel Augustus Mersy - Mustered out with the regiment.