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Confederate Regiment

21st Mississippi Infantry

Organized: Manassas, VA; mustered in 9/1861
Disbanded/Mustered out: Appomattox Courthouse, VA 4/9/1865


Commanding Officers on the Sharpsburg Campaign:
  Capt. John Sims
  Col. Benjamin G. Humphreys


This Regiment's Chain of Command:
  Army - Army of Northern Virginia
  Corps - Longstreet's Command
  Division - McLaws' Division
  Brigade - Barksdale's Brigade

Unit history

The regiment was formed from separate companies sent from Mississippi to Northern Virginia in the fall of 1861, where they were combined into the regiment and brigaded with 3 other Mississippi regiments under General P.G.T. Beauregard. They were at Manassas, and on the Peninsula Campaign, the brigade now under the command of General Barksdale.

On the Sharpsburg Campaign

"They participated in the scaling of Maryland Heights by the brigades of Barksdale and Kershaw September 12 and 13, with some skirmishing, and reached the field of Sharpsburg on the 17th after the battle had been raging a few hours. The extraordinary fatigues of the campaign had reduced the effective strength of the regiment to 18 officers and 182 men, of whom 6 were killed and 56 wounded in this bloody battle. The Twenty-first was distinguished in the driving of the enemy from the woods in front of the brigade, beyond which the Twenty-first and Seventeenth pursued some distance in an open field.Captain Sims commanded in the battle, but Colonel Humphreys arrived near the close of the fight and 'his timely presence cheered and animated the whole brigade.'"
(from Rowland)


Initial Strength: 200; Killed in Action (KIA): 6; Wounded (WIA): 56;
Losses, % of Initial Strength: 31%

Maps Showing this Unit

Battlefield Tablets for this Unit

Tablet #357: McLaws' Division, Longstreet's Command - 16 Sep, 11 AM to 18 Sep, 9 PM
Tablet #358: Barksdale's Brigade, McLaws' Division - 17 Sep, 5 AM to 18 Sep, 9 PM

After the Sharpsburg Campaign

They fought at Fredericksburg, Chancellorsville, and Gettysburg - where Barksdale was killed and Col Humphreys was promoted Brigadier-General to command the brigade. They then went West with General Longstreet, fighting at Chickamauga, and on the Chatanooga and Knoxville Campaigns. In early 1864 they returned to the Army of Northern Virginia, and fought in the Wilderness, at Cold Harbor, and in the seige of Petersburg. In August they fought in the Shenadoah Valley campaign - notably at Winchester, Berryville, and Cedar Creek. In November 1864 they were back in the defences of Richmond, fighting with the ANV to Appomattox.

References & Notes

Source: Rowland, Dunbar, Military History of Mississippi, 1803-1898, Nashville TN: 1908 - transcribed online on the Mississippi in the Civil War site.

We have 9 individuals in the AotW database for this unit:


Co. Rank Name Casualty? Details*
CLtRoberts, J. M.Died   00/00     We have some details for this person
DCaptSims, Jr., John Hampton        We have a picture for this person We have some details for this person
FPvtWells, Thomas H.Died   00/00     We have some details for this person
GLtKriegner, Joseph Q.Died   00/00     We have some details for this person
IPvtBlalock, W. Died   00/00     We have some details for this person
KSgtPruitt, John CalvinKIA   09/17     We have a picture for this person We have some details for this person
F&SColHumphreys, Benjamin Grubb        We have a picture for this person We have some details for this person
UnkPvtBundy, J. Died   00/00
UnkPvtErvin, J. S.Died   00/00     We have some details for this person


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