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12th Illinois Infantry Regiment
| Field | Value | |
|---|---|---|
| unit_name | 12th Illinois Infantry Regiment | |
| dates | May 2, 1861 to July 18, 1865 | |
| country | [[File:US flag 34 stars.svg | 23px]] United States |
| allegiance | Union | |
| branch | Infantry | |
| size | Regiment | |
| garrison | Cairo, Illinois | |
| battles | Battle of ShilohBattle of CorinthBattle of ResacaBattle of AtlantaBattle of JonesboroMarch to the SeaBattle of Bentonville |

The 12th Illinois Infantry Regiment, also known as the 1st Scotch Regiment, was an infantry regiment that served in the Union Army between May 2, 1861 and July 18, 1865, during the American Civil War.
Service
Initial 3 month service
The infantry regiment was organized at Springfield, Illinois and mustered in on May 2, 1861 for a three-month service. The regiment was transferred to Cairo, Illinois, for garrison duty until August 1861. By the time the regiment was mustered out on August 1, 1861, they had lost four to disease.
3 year service
The 12th Illinois Infantry was mustered into Federal service for a three-year enlistment on August 1, 1861, at Cairo, Illinois.
The regiment was mustered out on July 18, 1865, at Camp Butler National Cemetery Camp Butler, Illinois.
Total strength and casualties
The regiment suffered 5 officers and 143 enlisted men killed in action or mortally wounded and 3 officers and 109 enlisted men who died of disease, for a total of 260 fatalities.
Commanders
- Colonel John McArthur – promoted to brigadier general on May 1, 1862.
- Colonel Augustus L. Chetlain – promoted to brigadier general on December 19, 1863.
- Lieutenant Colonel Henry Van Sellars – mustered out with the regiment.
- Captain Duncan MacLean, of McLean County – promoted to major on January 22, 1862.
References
Bibliography
- Dyer, Frederick H. (1959). A Compendium of the War of the Rebellion. New York and London. Thomas Yoseloff, Publisher. .
References
- Dyer (1959), Volume 3 p. 1,049.
- http://www.civilwararchive.com/Unreghst/unilinf1.htm The Civil War Archive website after Dyer, Frederick Henry. '''A Compendium of the War of the Rebellion'''. 3 vols. New York: Thomas Yoseloff, 1959.
- http://www.rootsweb.com/~ilcivilw/f&s/012-fs.htm Illinois in the Ci[[65th Illinois Volunteer Infantry Regiment. 65th Illinoia Volunteer Infantry: "The Second Scotch Regiment"]]vil war website after Illinois Adjutant General's muster rolls
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