The Fourth Alabama Painting by Don Troiani

Second Brigade, Army of the Potomac

Private A Lacombe, Company C, 6th Alabama Infantry

Private A Lacombe, 6th Alabama Infantry, Company C, postwar

Sixth Louisiana Infantry

Mustered in Confederate service on 4 June, 1861. Companies A, D, F, and I arrived at Manassas Junction on 14 June, 1861, and Companies B, C, E, G, H, and K on 16 June, 1861

COLONEL I G SEYMOUR
LIEUTENANT COLONEL L LAY
MAJOR S L JAMES

Company A Union and Sable Rifles: CAPT. A MCARTHUR
Company B Calhoun Guards: CAPT. H B STRONG
Company C St. Landry Light Guards: CAPT. N G OFFUTT
The company was organised at Washington, St Landry Parish, Louisiana, and was ordered to Camp Moore, Louisiana, on 26 May, 1861.
Company D Tensa Rifles: CAPT. C B TENNEY
Company E Mercer Rifle Guards: CAPT. T F WALKER
Company F Irish Brigade, Company B: CAPT. W MONAGHAN
Company G Pemberton Rangers: CAPT. I S SMITH
Company H Orleans Rifles: CAPT. T F FISHER
Company I Irish Brigade, Company A: CAPT. S L James
First Lieutenant J Hanlon was promoted to captain on 6 June, 1862.
Company K Violet Guards: CAPT. W H MANNING

Sources

"Monaghan's Irishmen dug rifle pits along the stream and rested on their arms."

Irish rebels, Confederate tigers: A history of the 6th Louisiana Volunteers, by James P Gannon

Foreigners in the Confederacy, by Ella Lonn

A guide to Louisiana Confederate military organizations 1861–1865, by A W Bergerun, Jr.

Notes

The 6th Louisiana Infantry was organised at Camp Moore, Louisiana on 2 June, 1861, and eight companies were mustered in Confederate service for twelve months and two for the war on 4 June, 1861. Companies A, D, F, and I, under the command of Lieutenant Colonel L Lay, were ordered to Camp Pickens, Manassas Junction, on 9 June, 1861, and Companies B, C, E, G, H, and K, under the command of Colonel I G Seymour and Major S L James, on 11 June, 1861. The 6th Louisiana Infantry arrived at Camp Pickens, Manassas Junction, on 14 and 16 June, 1861, and encamped along the Orange & Alexandria railroad, several miles east at Fairfax Station, Virginia. After the first battle of Manassas the regiment encamped a few miles east of Centreville, Virginia, and was reorganised in May 1862.

Captain R S Ewell, 1st United States Dragoons, resigned his commission on 7 May, 1861, and was commissioned a lieutensnt colonel of cavalry, Confederate States Army. Lieutenant Colonel R S Ewell was ordered to proceed to Camp Ashland, near Richmond, Virginia, in April 1861, and was ordered to Culpeper Courthouse, Virginia, on 10 June, 1861. As soon as Lieutenant Colonel R S Ewell arrived at Culpeper Courthouse, Virginia, he was ordered to Fairfax Courthouse, Virginia, and to assume command of the Warrenton Rifles, the Rappahannock Cavalry, and the Prince William Cavalry stationed at the post (See the Skirmish at Fairfax Courthouse).

On 25 July 1861, the Army of the Potomac was reorganised and the regiment was assigned to the Eighth Brigade, First Corps, Army of the Potomac, under the temporary command of Acting Brigadier General I G Seymour, senior colonel, 6th Louisiana Infantry.