Civil War Wiki
9th Regiment Illinois Volunteer Mounted Infantry (3 Years)
Illinois state flag
Active March 15, 1863 to July 9, 1865
Country United States
Allegiance Union
Branch Mounted Infantry
Equipment Spencer carbine

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


The 9th Illinois Infantry was converted to the 9th Illinois Volunteer Mounted Infantry Regiment on March 15, 1863. The regiment fought in the Battle of Athens (1864).

The regiment was mustered out on July 9, 1865.

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.[1]


  • Colonel Augustus Mersy - Mustered out with the regiment.[2]

See also[]


  1. The Civil War Archive website after Dyer, Frederick Henry. A Compendium of the War of the Rebellion. 3 vols. New York: Thomas Yoseloff, 1959.
  2. Illinois in the Civil War website after Illinois Adjutant General's muster rolls