
The 1st Arkansas Infantry (1861) was a Confederate Army infantry regiment during the American Civil War. The unit was composed mainly of militia units called to service by Colonel Solon F. Borland in response to an anticipated invasion of Northeast Arkansas in the fall of 1861.

The 1st Arkansas Cavalry Battalion (Stirman's) (1864-1865) was a Confederate Army cavalry battalion during the American Civil War. The unit was also known as Brooks 1st Arkansas Cavalry Battalion, Stirman's, 1st Arkansas Cavalry Battalion, Stirman's Sharpshooter Regiment, 1st Regiment Arkansas Sharpshooters, and finally simply as Stirman's Arkansas Cavalry Regiment.

The Crawford's 1st Arkansas Cavalry Regiment (1863–1865) was a Confederate Army cavalry regiment during the American Civil War. The unit was originally organized as a Battalion, but after a short while, two additional companies were added bringing the unit to regimental strength. Officially designated by the State Military Board as the 10th Regiment Arkansas Cavalry, it was almost never referred to as such during the Civil War. It was generally referred to in contemporary documents as Crawford's 1st Arkansas Cavalry. The Compiled Service Records of the men are archived under 1st (Crawford's) Arkansas Cavalry, Rolls 1 and 2.

The 1st (Dobbin's) Regiment Arkansas Cavalry (1861–1865) was a Confederate Army cavalry regiment during the American Civil War.

The 1st Arkansas Cavalry Regiment was a cavalry regiment of the Confederate States of America. Officially designated by the Arkansas State Military Board as the 6th Regiment Arkansas Cavalry, it was almost never referred to as such during the Civil War. It was usually called Monroe's 1st Arkansas Cavalry, occasionally the 4th Arkansas Cavalry, and more rarely the 1st Trans-Mississippi Cavalry. It is also found in the Official Records of the American Civil War as Fagan's Cavalry and Monroe's Cavalry. The Compiled Service Records of the men are filed under the designation "1st (Monroe's) Cavalry," Rolls 4 and 5.

The 1st Arkansas Consolidated Infantry (1865) was a Confederate Army infantry regiment during the American Civil War. This unit was created in April 1865 from the remnants of Arkansas regiments assigned in the Confederate Army of Tennessee. Another 1st Arkansas Consolidated Regiment had been formed the previous year in the Department of the Trans-Mississippi from the remnants of several Arkansas units which had been captured the at the Siege of Vicksburg and Port Hudson during the summer of 1863.

The 1st Arkansas Consolidated Infantry (Trans-Mississippi) (1864–1865) was a Confederate States Army infantry regiment during the American Civil War. The regiment is separate from and has no connection with the 1st Arkansas Consolidated Infantry Regiment which was formed in the Confederate Army of Tennessee in April 1865 and is also separate from the 1st Regiment, Arkansas State Troops, which became the 15th (Josey's) Arkansas Infantry Regiment and Fagan's 1st Arkansas Infantry Regiment, which was formed in 1861 and served in the Army of Tennessee.

The 1st Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The regiment was raised in April 1861 by Colonel Thompson B. Flournoy. It moved first to Virginia, but transferred back to Tennessee and served the rest of the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns. Following its depletion in numbers, the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Infantry Regiment. There were three regiments known as "1st Arkansas" during the war. The second unit with the designation of "1st Arkansas" was the 1st Infantry, Arkansas State Troops, which was mustered into Confederate service at Pitman's Ferry, Arkansas, on 23 July 1861, under the command of Colonel Patrick Cleburne; this unit was eventually redesignated as the 15th Arkansas Volunteer Infantry. The third unit bearing the title "1st Arkansas" was the 1st Arkansas Volunteer Infantry, which served with the Union Army.

The 1st Arkansas Light Artillery, originally known as the Fort Smith Artillery (1861), was an artillery battery of the Confederate States Army that served during the American Civil War. The unit was actually a pre-war volunteer militia company which was activated as part of the Arkansas State Troops and mustered out of state service following the Battle of Wilson's Creek. The unit immediately re-organized and re-enlisted for Confederate service. The unit spent the majority of the war in the western theater, fighting as part of the Confederate Army of Tennessee. The unit is also known as Reid's Battery, Provence's Battery, Humphreys' Battery and finally Rivers' Battery.

1st Arkansas Mounted Rifles (1861–1865) was a Confederate Army cavalry regiment during the American Civil War. The unit was formed as a mounted infantry regiment, but was dismounted in the spring of 1862 and remained dismounted for the remainder of the war. The unit participated in the earliest battles in the western theater at Wilson's Creek and surrendered with the remnants of the Army of Tennessee in North Carolina in April 1865.

The 1st Arkansas Consolidate Mounted Rifles (1865) was a Confederate Army cavalry regiment during the American Civil War.

The 1st Battalion, Arkansas State Troops (1863–1864) was an Arkansas State Cavalry battalion during the American Civil War. The unit is also some times referred to as Pettus' Battalion or Trader's Battalion, Arkansas State Troops. The unit was eventually consolidated with other units in late 1864 to form the Newton's 10th Arkansas Cavalry Regiment.

The 1st Cavalry Regiment, Arkansas State Troops (1861) was an Arkansas cavalry regiment during the American Civil War. The regiment was organized at Camp Walker, near Harmony Springs, Benton County, Arkansas. The regiment was officially designated as the Third Regiment (Cavalry), Arkansas State Troops by the State Military Board, but was designated as the 1st Arkansas Cavalry by Brigadier General Nicholas Bartlett Pearce, Commander, 1st Division, Provisional Army of Arkansas. The regiment is referred to as the "Carroll's Regiment" in contemporary accounts.

The 2nd Arkansas Cavalry Regiment (Slemons') (1861–1865) was a Confederate Army cavalry regiment during the American Civil War. This regiment was also referred to in the official records as the 4th Arkansas Cavalry Regiment. Another regiment, commanded by Colonel Thomas J. Morgan, was also designated as the 2nd Arkansas Cavalry Regiment. Following Price's Raid in 1864, the survivors of the regiment were reorganized as the 18th Arkansas Cavalry Battalion, which was also referred to as McMurtrey's Arkansas Cavalry Battalion.

The 2nd Arkansas Field Battery (1861–1865) was a Confederate Army artillery battery during the American Civil War. Also known as: Dallas Artillery and Hart's Arkansas Battery. The battery was re-organized on two occasions. Following a charge of cowardice during Battle of Pea Ridge, the battery was ordered to disband. After being cleared of that charge the battery was reorganized and served until it was captured at the Battle of Arkansas Post. After being exchanged and re-organized for the second time, it served until the final surrender of Confederate forces in May 1865.

The 2nd Arkansas Infantry Battalion (1861–1862) was a Confederate Army infantry battalion during the American Civil War. The 2nd Arkansas Infantry Battalion was one of only three Arkansas units which served in Virginia during the Civil War. The 1st Arkansas Infantry Regiment arrived in Virginia in June 1861, and was present, though not engaged, at the battle of Manassas in July. The 3rd Arkansas Infantry Regiment arrived in Virginia in July 1861, and was sent to the mountains of western Virginia.

3rd Arkansas Cavalry (1861–1865) was a Confederate Army cavalry regiment from Arkansas during the American Civil War.

The 3rd Arkansas Consolidated Infantry (1864–1865) was a Confederate Army infantry regiment during the American Civil War. The regiment is separate from and has no connection with the 3rd Arkansas Infantry Regiment which served in the Confederate Army of Northern Virginia and is also separate from the 3rd Regiment, Arkansas State Troops, which participated in the Battle of Wilson's Creek.

The 3rd Infantry, Arkansas State Troops (1861) was an Arkansas State infantry regiment that served during the American Civil War. The regiment was designated as the 2nd Infantry, Arkansas State Troops, by the State Military Board, but it was named the 3rd Arkansas by Brigadier General Nicholas Bartlett Pearce, Commander, 1st Division, Provisional Army of Arkansas. The regiment is generally referred to as the "3rd Regiment, Arkansas State Troops", or "Gratiot's Regiment" in contemporary accounts. This unit is distinguished from the 3rd Arkansas Infantry Regiment which served in the Eastern Theater of War in the Confederate Army of Northern Virginia. The unit is also distinguished from a later state organization known as Adams' 3rd Arkansas State Troops, which was organized in 1862 and participated in the Battle of Prairie Grove before being disbanded.

The 4th Arkansas Cavalry Regiment was a cavalry regiment of the Confederate States Army from the state of Arkansas during the American Civil War. The regiment was designated at various times as Carroll's Regiment Arkansas Cavalry, Thompson's Regiment Arkansas Cavalry, and Gordon's Regiment Arkansas Cavalry. During the same time it was also known as 1st Regiment Arkansas Cavalry, 2nd Regiment Arkansas Cavalry, 9th Regiment Arkansas Cavalry and the 11th Regiment Arkansas Cavalry.

The 4th Arkansas Field Battery (1862–1865) was a Confederate Army artillery battery during the American Civil War. The battery spent its entire existence in the Department of the Trans-Mississippi, including time in the Indian Territory. Late in the war the battery supported operations in Louisiana. Also known as: Desha County Artillery and West's Battery.

The 4th Battalion, Arkansas Infantry was an infantry Battalion of the Confederate States Army during the American Civil War. The battalion served in the same brigade and was later consolidated with the 4th Arkansas Infantry Regiment, but units began as completely separate and unrelated organizations.

The 4th Arkansas Infantry was a Confederate Army infantry regiment from the state of Arkansas during the American Civil War. The 4th Arkansas served throughout the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns. Following its depletion in numbers the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Mounted Rifles. Another Arkansas unit also had the designation 4th Arkansas, the 4th Regiment, Arkansas State Troops which participated in the Battle of Wilson's Creek, but was never transferred to Confederate Service. There is no connection between the two units.

The 4th Infantry, Arkansas State Troops (1861) was an Arkansas State infantry regiment that served during the American Civil War. After being raised in mid-1861, the regiment was assigned to the command of Brigadier General Nicholas Bartlett Pearce, who was the commander of the 1st Division, Provisional Army of Arkansas. The regiment is referred to as the "4th Regiment Arkansas Volunteers", or "Walker's Regiment" in contemporary accounts; it was disbanded shortly after the Battle of Wilson's Creek in August 1861. Another Arkansas unit also had the designation 4th Arkansas, the 4th Arkansas Infantry Regiment which formed after the Battle of Wilson's Creek, and spent most of its service in the Confederate Army of Tennessee. There is no connection between the two units.

The 5th Arkansas Cavalry Regiment (1863–1865) was a Confederate Army cavalry regiment during the American Civil War. The regiment was designated at various times as Newton's Regiment Arkansas Cavalry, Morgan's Regiment Arkansas Cavalry, 2nd Regiment Arkansas Cavalry, and the 8th Regiment Arkansas Cavalry. This regiment should not be confused with a later regiment commanded by Col. Robert Crittenden Newton, which was a regiment of Arkansas State Troops usually referred to as Newton's 10th Arkansas Cavalry Regiment.

The 5th Arkansas Field Battery (1862–1865) was a Confederate Army artillery battery during the American Civil War. The unit was originally referred to as the 'Appeal Artillery or the Memphis Appeal Battery. Battlefield markers at the National Vicksburg Military Park describe the unit as Appeal (Arkansas) Battery. The unit served east of the Mississippi River until it surrendered at the end of the Vicksburg Campaign. After being exchanged, the battery re-organized and served the remainder of the war in the Department of the Trans-Mississippi.

The 5th Arkansas Infantry, also called the Fighting Fifth (1861–1865) was a Confederate Army infantry regiment organized in Arkansas to serve for the Confederate States of America during the American Civil War. It served throughout the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns. Following its depletion in numbers the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Infantry Regiment. Another Arkansas unit also had the designation 5th Arkansas, the 5th Regiment, Arkansas State Troops which participated in the Battle of Wilson's Creek, but was never transferred to Confederate Service. There is no connection between the two units.

The 6th Arkansas Infantry Regiment was a regiment of the Confederate States Army during the American Civil War. Organized mainly from volunteer companies, including several prewar volunteer militia units, raised in the southern half of Arkansas, the regiment was among the first transferred to Confederate Service. It served virtually the entire war in Confederate forces east of the Mississippi River. After the unit sustained heavy casualties during the Battle of Shiloh and Bragg's Kentucky Campaign, the unit spent most of the rest of the war field consolidated with the 7th Arkansas Infantry Regiment, to form the 6th/7th Arkansas Infantry Regiment.

The 7th Arkansas Volunteer Infantry (1861−1865) was a Confederate Army infantry regiment during the American Civil War. Organized mainly from companies, including several prewar volunteer militia companies, raised in northeastern Arkansas, the regiment was among the first transferred to Confederate service, and spent virtually the entire war serving east of the Mississippi River. After the unit sustained heavy casualties in the Battle of Shiloh and the Kentucky Campaign, the unit spent most of the rest of the war field consolidated with the 6th Arkansas Infantry Regiment to form the 6th/7th Arkansas Infantry Regiment.

The 8th Arkansas Infantry was a Confederate Army infantry regiment during the American Civil War from the state of Arkansas. It served throughout the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns. Following its depletion in numbers the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Infantry Regiment.

The 9th Arkansas Infantry Regiment was a regiment of the Confederate States Army during the American Civil War. It served in the Western Theater, seeing action in the Vicksburg, Tennessee and Georgia campaigns. Due to attrition; the 9th Arkansas was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Mounted Rifles.
The Netwon's 10th Arkansas Cavalry Regiment (1864–1865) was a Confederate Army Cavalry regiment during the American Civil War. The unit was originally organized from volunteer companies raised from the Arkansas State Militia in the Southern Arkansas Counties in the winter of 1863–1864 after the fall of Little Rock. It was originally organized as Pettus Battalion, Arkansas State Troops but was later enrolled in Confederal Service and Robert Crittenden Newton was elected Colonel.

The 10th Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War from the state of Arkansas. The unit is also known as A. R. Witt's Infantry, C. M. Cargile's Infantry, E. L. Vaughan's Infantry, Thomas D. Merrick's Infantry, S. S. Ford's Infantry, Obed Patty's Infantry, George A. Merrick's Infantry, Zebulon Venable's Infantry and Robert C. Bertrand's Infantry in contemporary accounts. After being captured at the Siege of Port Hudson, the unit reorganized as a mounted infantry unit, and was known as the 10th Arkansas Cavalry Regiment or Witt's Arkansas Cavalry.

The 11th Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. Following the units surrender during the Battle of Island No. 10, it was consolidated with Griffiths 17th Arkansas Infantry Regiment and mounted. Following the surrender of Port Hudson, some unit members returned to Arkansas and became part of Poe's Arkansas Cavalry Battalion and Logan's 11th Arkansas Cavalry Regiment.

The 15th (Northwest) Arkansas Infantry Regiment (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The unit was originally formed as the 3rd Arkansas Infantry Battalion. After receiving the required 10 companies, the unit was redesignated as the 21st (McRae's) Arkansas Infantry Regiment. Upon recognition that there was already a 21st Arkansas, the unit was again redesignated as the 15th Arkansas Infantry Regiment. This was the third Arkansas unit to bear the designation "15th Arkansas". The others are the 15th (Josey's) Arkansas Infantry Regiment and the 15th (Gee/Johnson) Arkansas Infantry Regiment. The unit saw action both west and east of the Mississippi, before serving in the Vicksburg campaign. The regiment was surrendered at Vicksburg in July 1863. After being paroled and exchanged, the regiment was consolidated with other depleted Arkansas regiments to form the 1st (Trans-Mississippi) Arkansas Consolidated Infantry Regiment.

The 16th Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. Organized from volunteer companies from northwest Arkansas, the unit participated in the Pea Ridge Campaign before crossing the Mississippi river and becoming involved in the Iuka-Corinth Campaign and the Siege of Port Hudson. After being surrendered with the garrison of Port Hudson the unit was reorganized in Arkansas and consolidated with the remnants of several other Arkansas Regiments to become the 1st Arkansas Consolidated Infantry Regiment (Trans-Mississippi).

The 17th Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The unit became split during the transfer of General Earl Van Dorn's Army of the West to Corinth, Mississippi in April 1862. The portion of the unit that was transferred east of the Mississippi River was eventually consolidated and became part of the 11th and 17th Consolidated Arkansas Infantry Regiment. The portion of the unit which remained in Arkansas was reorganized as the 35th Arkansas Infantry Regiment.

The 18th Arkansas Infantry (Marmaduke's) (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The unit was also briefly identified as the 1st Arkansas Infantry Battalion. The unit was most often referred to as the 3rd Confederate Infantry Regiment. The designation "Confederate Infantry Regiment" was intended to convey the difference between Provisional Confederate Army units and Regular Confederate Army Units, with Provisional units being those regiments who received a state designation such as "XX Arkansas Infantry Regiment". In practice, the designation was most often utilized when Regiments were assembled utilizing companies from more than one confederate state. The "3rd Confederate Infantry Regiment" is occasionally misidentified as the 3rd Arkansas Infantry Regiment commanded by Colonel Van H. Manning.

The 19th (Dawson's) Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War. The regiment was present for but not engaged during the Battle of Pea Ridge. At the Battle of Arkansas Post, the regiment became split, with part of the regiment surrendering with the garrison when the post capitulated. The captured portion of the regiment was eventually exchanged and released on the east side of the Mississippi and served the remainder of the war with the Confederate Army of Tennessee. The un-captured portion of the regiment was consolidated with the remnants of the 24th Arkansas and served the remainder of the war in the Department of the Trans-Mississippi.

The 21st Arkansas Infantry (1862–1865) was a Confederate Army infantry regiment during the American Civil War. The unit was organized from the consolidation of two understrength Arkansas units in May 1862. The unit participated in the Iuka-Corinth Campaign before becoming part of the garrison of Vicksburg Mississippi. After the capitulation of Confederate forces at Vicksburg, the 21st was paroled and exchanged back to Arkansas where it was combined with the remnants of several there Arkansas regiments to become the 1st Arkansas Consolidated Infantry Regiment (Trans-Mississippi). Another Arkansas Confederate infantry regiment, commanded by Colonel Dandridge McRae was also labeled the "21st Arkansas". To avoid confusion between two 21st Arkansas Regiments, McRae's regiment was later redesignated as the 15th (Northwest) Arkansas Infantry Regiment.

The 22nd Arkansas Infantry Regiment was a Confederate Army infantry regiment during the American Civil War (1862–1865). This regiment was originally organized as the 17th Arkansas Infantry Regiment, reorganized after the battle of Pea Ridge as 1st Regiment, Northwest Division, Trans-Mississippi Department, or Rector's War Regiment, redesignated as the 35th Arkansas in the summer of 1862, and reorganized and redesignated as the 22nd Arkansas following the Battle of Prairie Grove. The unit was also sometimes referred to as, King's Arkansas Infantry or McCord's Arkansas Infantry. This was the second regiment to be officially designated as the 22nd Arkansas. The first was mustered in at DeValls Bluff, Arkansas, on April 9, 1862, and later reorganized as the 20th Arkansas Infantry Regiment.

The 23rd Arkansas Infantry (1862–1865) was a Confederate Army infantry regiment during the American Civil War. In the summer of 1864, the unit was reorganized as a mounted infantry regiment in preparation for Price's Missouri Expedition and officially redesignated as the 42nd Arkansas Infantry (Mounted). The unit was often referred to as Lyle's Arkansas Cavalry in report from Price's Missouri Expedition. Due to its mounted status, the unit is also occasionally referred to as the 23rd Arkansas Cavalry Regiment.

The 25th Arkansas Infantry was an infantry regiment of the Confederate States Army during the American Civil War. The unit was originally organized as Turnbull's 11th Arkansas Infantry Battalion. Upon being increased by the required number of companies the battalion was organized as the 30th Arkansas Infantry Regiment but was later redesignated as the 25th Arkansas Infantry. There were two regiments officially designated as the 30th Arkansas Infantry. The other "30th Arkansas" served west of the Mississippi River, in the Department of the Trans-Mississippi and was also known as 5th Trans-Mississippi Regiment or the 39th Arkansas or Rogan's Arkansas Cavalry during Price's 1864 Missouri Expedition.

The 27th Arkansas Infantry Regiment (1862–1865) was a Confederate Army infantry regiment during the American Civil War. The unit served entirely in the Department of the Trans-Mississippi and surrendered at Marshall, Texas, at the war's end.

The 37th Arkansas Infantry Regiment (1862–1865) was a Confederate Army infantry regiment during the American Civil War. It was originally designated as the 29th Arkansas Infantry Regiment and was also known as 1st Trans-Mississippi Infantry Regiment. The unit served in the Department of the Trans-Mississippi from its formation in the summer of 1862 until the surrender in May 1865.

The Adams' Arkansas Infantry Regiment was a Confederate Army infantry regiment which existed during the American Civil War (1862–1865). The regiment was officially designated by the state military board as the 3rd Regiment, Northwest Division, District of Arkansas. There were two other Arkansas infantry regiments that were designated as the 3rd Arkansas during the Civil War: the 3rd Arkansas Infantry Regiment, which spent the entire war in the Eastern Theater of Operations assigned to the Confederate Army of Northern Virginia and the 3rd Arkansas State Troops which was assigned to General N. B. Pearce's 1st Division, Provisional Army of Arkansas, and disbanded following the Battle of Wilson's Creek.

The units of the Arkansas Militia in the Civil War to which the current Arkansas National Guard has a connection include the Arkansas State Militia, Home Guard, and State Troop regiments raised by the State of Arkansas. Like most of the United States, Arkansas had an organized militia system before the American Civil War. State law required military service of most male inhabitants of a certain age. Following the War with Mexico, the Arkansas militia experienced a decline, but as sectional frictions between the north and south began to build in the late 1850s the militia experienced a revival. By 1860 the state's militia consisted of 62 regiments divided into eight brigades, which comprised an eastern division and a western division. New regiments were added as the militia organization developed. Additionally, many counties and cities raised uniformed volunteer companies, which drilled more often and were better equipped than the un-uniformed militia. These volunteer companies were instrumental in the seizure of federal installations at Little Rock and Fort Smith, beginning in February 1861.

The Helena Artillery (1861-1865) was a Confederate Army artillery battery during the American Civil War. The unit was known by several other designations during the war including; Clarkson's Battery, Company A, Shoup's Artillery Battalion, Calvert's Battery and Key's Battery. The unit was occasionally assigned to artillery battalions from other states, so the Arkansas unit was at various times designated as Company C, 20th Alabama Light Artillery Battalion and later as Company H, 28th Georgia Artillery Battalion.