Reserves, Army of the Potomac

Twelfth Mississippi Infantry

Mustered in Confederate service on 12 May, 1861, and five companies arrived at Manassas Junction in the morning on 22 July, 1861. Did not participate in the first battle of Manassas

COLONEL R GRIFFITH
LIEUTENANT COLONEL W H TAYLOR
MAJOR J R DICKENS

Company A Charlie Clark Rifles: CAPT. J J McLean
The company was mustered in state service at Union Church, Jefferson County, Mississippi, on 11 March, 1861.
Company B Natchez Fencibles: CAPT. E M BLACKBURN
The company was mustered in state service at Adams County, Mississippi, on 5 March, 1861, and was stationed at Satartia, Yazoo County, Mississippi, on 13 May, 1861.
Company C Raymond Fencibles: CAPT. E R Gale
The company was mustered in state service at Brookhaven, Lincoln County, Mississippi, on 30 March, 1861, and was ordered to proceed to Corinth, Mississippi, on 10 May, 1861.
Company D Pettus Relief or Rifles: CAPT. M B harris
The company was mustered in state service at Hazelhurst, Copiah County, Mississippi, on 4 March, 1861.
Company E Sardis Blues: CAPT. R W Crump
The company was mustered in state service at Panola County, Mississippi, on 20 April, 1861.
Company F Durant Rifles: CAPT. J A Cason
The company was mustered in state service on 16 March, 1861, and was ordered to Camp Clark, near Corinth, on 9 May, 1861. The company was ordered to proceed to Camp Pickens, Manassas Junction, on 16 July, 1861.
Company G Vicksburg Sharpshooters: CAPT. H H MILLER
The company was mustered in state service at Warren County, Mississippi, on 13 March, 1861.
Company H Claiborne Guards: CAPT. H Hughes
The company was mustered in state service at Port Gibson, Claiborne County, Mississippi, by Major McCardle and Captain J J McLean on 11 March and 27 April, 1861, respectively. Captain J G Hastings resigned prior to the departure of the company and the company was ordered to proceed to Camp Clark, near Corinth, via Jackson, Mississippi.
Company I Satartia Rifles: CAPT. E R Gale
The company was mustered in state service at Satartia, Yazoo County, Mississippi, on 24 April, 1861.
Company K Lawrence Rifles: CAPT. R J Bowen
The company was mustered in state service at Lawrence County, Mississippi, on 30 March, 1861.

Sources

"The Twelfth Mississippi reached the Manassas battlefield just in time to go quickly into the fight."

The Confederate Veteran, Volume 9: The late Col. William M. Inge, his remarkable military career, Confederate, p20

Supplement to the Official Records: Part II, Record of Events, Volume 33, Serial No.45: Record of events for Twelfth Mississippi Infantry, March 1861–December 1864, edited by James B Hewett

Southern Historical Society Papers, Volume 32: Featherstone-Posey-Harris Mississippi Brigade, by Captain E Howard McCaleb, of New Orleans

Roster and sketches of the several military companies which were in regular service of the Confererate States during the civil war from Yazoo County, Mississippi

Military History of Mississippi, 1803–1898, taken from the official and statistical register of the State of Mississippi, 1908, by Dunbar Rowland

Notes

The 12th Mississippi Infantry was organised at Camp Clark, near Corinth, Mississippi, in May 1861 and mustered in Confederate service on 12 May, 1861. Companies I and K were mustered in Confederate service on 9 and 10 May, 1861, respectively. The regiment was ordered to proceed to Camp Miller, near Union City, Tennessee, on 1 June, 1861, to cooperate in Major General l Polk's campaign against St Louis, Missouri. On 9 July, 1861, the Secretary of War L P Walker sent telegrams to Major General L Polk and Brigadier General C Clark requesting the 12th Mississippi Infantry and 13th Mississippi Infantry proceed to Lynchburg, Virginia, without delay (See the 13th Mississippi Infantry).

Camp Pickens, Manassas Junction, 22 July, 1861: The 12th Mississippi Infantry proceeded to Lynchburg, Virginia, on 18 July, 1861, and five companies arrived at Camp Pickens, Manassas Junction, in the morning on 22 July, 1861. The 12th Mississippi Infantry was delayed by a railroad accident and enacmped at Camp Pickens, Manassas Junction, guarding captured pieces parked around Brigadier General P G T Beauregard's Headquarters.

After the first battle of Manassas the 12th Mississippi Infantry encamped along the Bull Run River and was encamped at Camp Masked Battery, near Fairfax Station, Virginia, on 31 August 1861.

Brigadier General C Clark, Army of Mississippi, was appointed to command the post at Camp Clark, near Corinth, Mississippi.

On 25 July 1861, the Army of the Potomac was reorganised and the 12th Mississippi Infantry was assigned to the Second Brigade, First Corps, Army of the Potomac, under the command of Brigadier General R S Ewell.

Orders of Battle