The 1st Arkansas (State Troops) was organized from Volunteer Companies organized in the Arkansas State Militia. Several of these Volunteer Companies had participated in the seizure of the Federal Arsenal at Little Rock in January 1861. These units were enrolled in state service on 14 May 1861 at Mound City, six miles upstream of Memphis on the Mississippi River. Captain Patrick R. Cleburne, of the Yell Rifles, was appointed colonel of the regiment. This unit was placed under the command of Col. Patrick Cleburne, and was enrolled in Confederate service on 23 July 1861, at Pitman's Ferry, AR and was initially designated as the '1st Arkansas Infantry'. However, the Confederate War Department discovered that there was already a 1st Arkansas Infantry, under Colonel James Fleming Fagan. The 1st Regiment, Arkansasa State Troops, was thus redesignated as the 15th Arkansas Infantry Regiment, on 31 December 1861. Due to battle losses, the 13th and 15th Arkansas Regiments were consolidated on 20 December 1862, just before the Battle of Murfreesboro. Toward the end of the civil war, ten depleted Arkansas regiments, including the 15th Arkansas, were merged to form the 1st Arkansas Consolidated Infantry, 9 April 1865. This regiment surrendered with the Army of Tennessee at Greensboro, North Carolina, 26 April 1865. The 15th Arkansas was composed of Militia units from the following counties: