In early March 1862 during the American Civil War, Union forces defeated Confederate troops in northwestern Arkansas during the
Battle of Pea Ridge, after which most Confederate troops were transferred out of Arkansas. During the campaigning following Pea Ridge, Union troops captured the city of
Helena, Arkansas, in July 1862. The Confederates rebuilt a significant fighting force in Arkansas, but were defeated at the
Battle of Prairie Grove in December. Despite these setbacks, control of the Arkansas River remained in Confederate hands at the close of 1862. On January 11, 1863, Union forces captured Confederate-held Fort Hindman on the Arkansas River in the
Battle of Arkansas Post, which was about from the junction of the Arkansas and
Mississippi Rivers. However, instead of pushing up the Arkansas River, the troops were withdrawn to fight in the
Vicksburg campaign. Other Union troops stationed in Arkansas were also transferred to the operations against
Vicksburg. Confederate forces in Arkansas decided to attempt to draw off some of the pressure on Vicksburg with an assault on Helena. The ensuing
Battle of Helena was a bloody Confederate repulse on July 4 in which the Confederates suffered over 1,600 casualties. Vicksburg surrendered the same day. The fall of Vicksburg freed up Union troops for an offensive against the Arkansas River Valley and
Little Rock, the state capital. Defending the region was the Confederate District of Arkansas, which was under the command of the ill Lieutenant General
Theophilus Holmes, who turned command over to Major General Sterling Price on July 23. On paper, the Confederates had about 32,000 men in the district, but only 14,500 had been present for duty before Helena. Expecting an assault, Price repositioned his forces and began building fortifications across the Arkansas River from Little Rock. Price believed that he could only defend Little Rock against greater Union numbers if his fortifications were directly attacked, but this was unlikely as the Arkansas River was readily crossable at several points in the area. The
flanks of Price's fortified position were covered by a swamp on one side and the Arkansas River on the other. Federal cavalry commanded by Brigadier General John W. Davidson moved out from
Wittsburg on August 1, reaching
Clarendon on August 9. Another Union force, composed of infantry, cavalry, and artillery, left Helena on August 11, under the command of Major General Frederick Steele. Steele's command numbered about 7,000 men, and Davidson's about 6,000. The two forces joined at Clarendon, with Steele's men arriving in stages beginning on August 15. The overall command was known as the
Army of Arkansas. Steele's men were drawn from elements of the
XIII Corps and the
XVI Corps and were organized into two divisions, while Davidson's division was taken from the
Department of Missouri. The Union units suffered badly from disease, but met only minor resistance with the exception of the August 27
Battle of Bayou Meto. After a pause beginning of September 2, the Union forces resumed their advance on September 6, reaching the Arkansas River the next day and winning the
Skirmish at Ashley's Mills. Steele decided not to directly assault Price's fortifications on the north side of the Arkansas River, instead planning on having his infantry advance along the north bank of the river while Davidson and the cavalry crossed the Arkansas River and forced the Confederates to abandon the fortifications by
outflanking them. Construction of a
pontoon bridge across the river began on September 9. == Battle ==