43rd Illinois Volunteer Infantry Regiment

43rd Regiment Illinois Volunteer Infantry
Illinois state flag
Active	October 12, 1861, to November 30, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	Battle of Shiloh Siege of Vicksburg

The 43rd Regiment Illinois Volunteer Infantry, known as the "Koerner Regiment" after Gustav Körner, was an infantry regiment that served in the Union Army during the American Civil War.

The 43rd Illinois Infantry was organized at Camp Butler, Illinois and mustered into Federal service on October 12, 1861.

The regiment was mustered out on November 30, 1865.

The regiment suffered 8 officers and 75 enlisted men who were killed in action or mortally wounded and 2 officers and 161 enlisted men who died of disease, for a total of 246 fatalities.