Becton. This company, from Prairie County, was previously assigned as Company H, Lemoyne's 17th Arkansas. Company H – Commanded by Captain John W. Mills. This company, from Yell County, was previously assigned as Company D, Lemoyne's 17th Arkansas. Company I – Commanded by Captain Calvin C. Nailor. This company, from Yell County, was previously assigned as Company E, Lemoyne's 17th Arkansas. Company K – Commanded by Captain Green F. Bond. Colonels Jordan E. Cravens and William G. Matheny, and Majors W. M. Dowdle and Harrison Moore were in command. Service During the Iuka-Corinth Campaign, the 21st Arkansas was assigned to Brigadier General William L. Cabell's brigade of Brigadier General Dabney H. Maury's Division of Major General Sterling Price's 1st Corps the Confederate (Army of the West). During the Second Battle of Corinth, the 21st made a gallant attack on the Union works. The attack was described thus by one participating veteran of the 14th and later 21st Arkansas Infantry Regiment: The regiment reported 27 killed, 41 wounded, and 58 missing following the battles of Battles of Corinth and Hatchie Bridge. The regiment was assigned to Brigadier General Martin E. Green's brigade of Major General John S. Bowen's Division, of Lieutenant General John C. Pemberton's Army of Mississippi for the Vicksburg Campaign. When General Green was killed on June 27, 1863, Colonel Dockery of the 19th Arkansas was placed in command of Second Brigade. In January 1863, the 21st Arkansas joined the defenses of the approaches to Vicksburg, and joined the garrison fortifying Grand Gulf on the Mississippi River below Vicksburg. On April 29, 1863, Admiral David Porter's fleet of gunboats bombarded Grand Gulf in an attempt to clear the position in preparation for Grant's amphibious crossing of the Mississippi. Repulsed by the strong position and batteries at Grand Gulf, Grant moved further downstream to cross at Bruinsburg, Mississippi, flanking the Grand Gulf garrison out of their position. Marching to block the Union advance, Green's Brigade and the 21st Arkansas joined Confederate forces at the battles of Port Gibson on May 1, at Champion Hill and the Big Black River bridge on May 16 and 17, respectively, and was besieged at Vicksburg from May 19 until July 4, 1863. The unit suffered 37 casualties at Port Gibson early May and later had men (including Colonel Craven) captured at the battle of the Big Black River. The 21st Arkansas fell back to