Asher Walker enlisted as a private in Company A, the “Calhoun Escopets” Fourth Arkansas Infantry Regiment, CSA, 17 August 1861 at Mt. Vernon, Missouri. The unit was under the command of Col. Evander McNair. The Fourth served in Indian Territory in the fall of 1861, then fought at Pea Ridge in March 1862. 

They arrived too late for the Battle of Shiloh, but served in Price’s Division, the Army of the West, in the Corinth Campaign in May-June 1862. In the fall of 1862 they participated in the battles of Richmond and Perryville, KY, and in December 1862 were reassigned to McNair’s Brigade, McCown’s Division. 

Many battles followed, including Stones River, Jackson, MS, Chickamauga, Kennesaw Mtn., Peach Tree Creek, Atlanta, Ezra Church, the siege of Atlanta, Jonesboro, and Lovejoy’s Station. In the summer of 1863 they consolidated with the 4th and 34th Arkansas Infantry, and were then reassigned to D. H. Hill’s Brigade for Hood’s TN Campaign.

Asher was a teamster for the unit at the time he was captured, in Roling, Mississippi 22 December 1863. He was sent to Military Prison at Camp Douglas, Illinois 7 November 1864, then exchanged 4 May 1865 in New Orleans, Lousiana.