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 (making a total of three 15th Arkansas Regiments). Organization 21st Arkansas Infantry Regiment was organized on May 15, 1862, by consolidating four companies of McCarver's 14th Arkansas and six companies of Lemoyne's 17th Arkansas Regiments, (also known as the 17th and 18th Arkansas Battalions) to form the 21st (McCarver's) Arkansas Regiment. The unit was composed of the following companies: Company A – Commanded by Captain E.O. Wolfe. This company, originally organized at Pittman's Ferry, Arkansas, was previously assigned as Company C, McCarver's 14th Arkansas. Company B – Commanded by Captain John M. Wasson. This company, originally organized at Pocahontas, Arkansas, was previously assigned as Company I, McCarver's 14th Arkansas. Company C – Commanded by Captain Harper S. Taylor. This company, from Johnson County, was previously assigned as Company C, Lemoyne's 17th Arkansas. Company D – Commanded by Captain George W. Berryman. This company was formed by the consolidation of Companies A and B, of Lemoyne's 17th Arkansas. Both of these companies were originally raised in Conway County. Company E – Commanded by Captain Mathew L. Bone. This company was formed by the consolidation of Companies F and G of Lemoyne's 17th Arkansas. Both of these companies were originally raised in Yell County. Company F – Commanded by Captain T. J. Shinpox. This company, enlisted at Pittman's Ferry, Arkansas, was previously assigned as Company K, McCarver's 14th Arkansas. Prior to being assigned to the 14th, this company had served as Company D, 1st Battalion, 2nd Arkansas 30 Day Volunteer Regiment. The company had originally been organized as a volunteer company in the 25th Regiment, Arkansas State Militia, from Lawrence (Modern Woodruff) County. Company G – Commanded by Captain Jacob G.