Dockery consisted of: 18th Arkansas Mounted Infantry Regiment (Carroll's) 19th and 15th Consolidated Mounted Infantry Regiment 20th Arkansas Mounted Infantry Regiment (Jones) 12th Arkansas Mounted Infantry Battalion (Sharpshooters) The infantry portion of Dockery's brigade was a regimental size (approximately 400 man) organization and was commanded by Lieut. Col. Horatio G. P. Williams. This organization is occasionally referred to as the 19th Arkansas Infantry, but was actually composed of dismounted company size elements of: 15th Arkansas Infantry Regiment (Northwest), under Capt. Austin K. Etris 18th Arkansas Infantry Regiment (Carroll's), under Maj. Samuel H. Southerland 19th Arkansas Infantry Regiment (Dockery's), under Capt. Thomas M. Drewery 12th Arkansas Infantry Battalion, under First Lieut. James A. Gillespie The remnants of the following Arkansas regiments were also assigned to Dockery's brigade, but in numbers below company strength and the exact manner in which they were consolidated with the mounted and infantry portions of the brigade is unknown: 8th Arkansas Infantry Battalion 12th Arkansas Infantry Regiment 14th Arkansas Infantry Regiment (Powers'), 16th Arkansas Infantry Regiment 21st Arkansas Infantry Regiment (Craven's), and the 23rd Arkansas Infantry Regiment Campden Expedition After being exchanged and reorganized the regiment, along with the rest of Dockery's Brigade, saw extensive action during the Camden Expedition at the Battles of Prairie D'Ane, Marks' Mills, and Jenkins Ferry. The Expedition to Mount Elba The 1864 Camden Expedition was part of a two-pronged strategy by the Union Army to drive Confederate resistance out of southwestern Arkansas and northern Louisiana, and to penetrate into Confederate Texas. Union Major General Frederick Steele led a Union force from Little Rock on March 23, 1864, with the objective of joining forces with Major General Nathaniel Prentice Banks at Shreveport, Louisiana. Confederate forces in Arkansas were directed from Washington, where the Confederate government of the state relocated after the fall of Little Rock. In support of General Steele's movements toward Arkadelphia, Arkansas, Union Colonel Powell Clayton, stationed at Pine Bluff, decided to conduct an attack Colonel Dockery's forces at Monticello. Clayton had received information that Dockery was about to leave Monticello to oppose Steele's movement. The expedition to Mount Elba began on March 27, 1864 when the Powell's forces under left Pine Bluff. Colonel Clayton's force consisted of elements of Eighteenth Illinois Infantry, Twenty-eighth Wisconsin Infantry, Fifth Kansas Cavalry, First Indiana Cavalry, Seventh Missouri Cavalry (US), totaling approximately 237 men. Major General Sterling Price, the commander of the Confederate district