The 1st Regular Infantry Regiment, formerly the 1st Louisiana Militia Infantry, entered Confederate service in February, 1861. Most of the officers and men were from New Orleans and the immediate area. It served at Pensacola, then moved to Tennessee and took an active part in the Battle of Shiloh. After being on duty in Mississippi, the unit was assigned to Deas', Liddell's, and Gibson's Brigade. It participated in many conflicts from Murfreesboro to Nashville then served at Mobile. This regiment lost 8 killed, 71 wounded, and 23 missing at Murfreesboro, had 4 officers and 64 men in December, 1863, and during the Atlanta Campaign, May 9-27, reported 13 casualties. Only 39 men were present in November, 1864, and half that number were included in the surrender of the Department of Alabama, Mississippi, and East Louisiana. Companies of the Louisiana 1st Infantry Regiment - Strawbridge's Most of the men of this regiment were from New Orleans and the surrounding area.

The Louisiana 1st Volunteers Infantry Regiment completed its organization in April, 1861, at New Orleans, Louisiana. Ordered to Virginia, the unit served in the Department of Norfolk, then was assigned to A.R. Wright's, Starke's, Nicholl's, Iverson's, Stafford's, and York's Brigade, Army of Northern Virginia. It participated in the many difficult campaigns of the army from the Seven Days' Battles to Cold Harbor, marched with Early to the Shenandoah Valley, and ended the war at Appomattox. Companies Of The Louisiana 1st Infantry Regiment The companies of the 1st Louisiana were from Alexandria, New Orleans, and Shreveport. Company B became the Louisiana Guard Artillery Battery on July 21, 1861.

The Louisiana 12th Infantry Regiment completed its organization at Camp Moore, Louisiana, in August, 1861. Its companies were from the parishes of Caldwell, Claiborne, Vermilion, Cameron, Calcasieu, Jackson, Ouachita, Bossier, and Iberia. Sent to Missouri, the unit was captured at Island No. 10 in April, 1862. After being exchanged, it was assigned to Rust's, Buford's, T.M. Scott's, and Lowry's Brigade. It fought at Champion's Hill and Jackson before participating in the campaigns of the Army of Tennessee from Resaca to Bentonville. In July, 1862, the unit contained 41 officers and 546 men, reported 11 killed, 57 wounded, and 5 missing out of the 318 engaged at Peach Tree Creek, lost many during Hood's Tennessee Campaign, and surrendered with only a remnant on April 26, 1865. Its commanders were Colonel Thomas M. Scott; Lieutenant Colonels James A. Boyd, Wade H. Hough, Noel L. Nelson, and Thomas C. Standifer; and Majors John C. Knott and Henry V. McCain.

The Louisiana 9th Infantry Regiment was organized at Camp Moore, Louisiana, in May, 1861 and soon moved to Virginia. Its companies were recruited in the following parishes: Rapides, Bossier, Bienville, De Soto, Livingston, Jackson, Washington, Claiborne, East Carroll, and Madison. The unit served in General R. Taylor's Brigade during Jackson's Valley Campaign and the Seven Days' Battles, then was assigned to Starke's, Hays', and York's command. It fought in many conflicts from Cedar Mountain to Cold Harbor, was involved in Early's operations in the Shenandoah Valley, and later shared in the Appomattox Campaign. This regiment lost 4 killed and 36 wounded at Cross Keys and Port Republic, had 21 killed and 55 wounded at Sharpsburg and 25 killed and 57 wounded at Chancellorsville. It reported 14 casualties at Second Winchester, lost twenty-one percent of the 347 engaged at Gettysburg, and had 130 captured at Rappahannock Station. Only 4 officers and 64 men surrendered with the Army of Northern Virginia.