18th Illinois Volunteer Infantry Regiment

The 18th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.

Service
The 18th Illinois Infantry was organized at Aurora, Illinois and mustered into Federal service on May 28, 1861 for a three year enlistment.

The regiment was mustered out of service on December 31, 1865.

Total strength and casualties
The regiment suffered 6 officers and 99 enlisted men who were killed in action or who died of their wounds and 7 officers and 282 enlisted men who died of disease, for a total of 394 fatalities.

Commanders

 * Colonel Michael K. Lawler - promoted to brigadier general on April 14, 1863.
 * Colonel Daniel H. Brush - resigned August 21, 1863.
 * Lieutenant Colonel Samuel B Marks - resigned 1864