From Louisville he would have been sent to one of the Northern prison camps, which one is not identified.

He must have been paroled, subject to exchange which may have occured sometime after August 31, 1864, the last Company C muster roll.

It is conceivable he rejoined his unit prior to war's end and promoted 1st Sergeant. Unfortunately, without a muster roll notation, we have no way of authenticating such a claim.

The US War Department, who State pension boards checked for service, wouldn't know, as they relied on muster rolls. However, I believe the UDC relied on Comrades to authenticate service, and I believe they were pretty strict.

.........................................

A. M. Peterson, age 15, Private, Capt. Cameron’s Company, Dallas Rifles, 6th Regiment,* enlisted June 2, 1861 at Little Rock, Ark., recorded April 30, 1863 as 4th Corporal, captured near Chickamauga September 19, 1863, forwarded to Louisville, Ky. October 1, 1863,** recorded 2nd Corporal, absent, February 29, 1864, last recorded absent, captured on the August 31, 1864 muster roll,*** no further records

* This company subsequently became Company C, 6th Regiment Arkansas Infantry,

** Federal POW document records his rank as Private

*** There are no subsequent Company C muster rolls found in these records

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Arkansas

……………..

A. M. Peterson

Enlisted as a Corporal (date unknown).
"C" Co. AR 6th Infantry

Sources used by Historical Data Systems, Inc.
- Index to Compiled Confederate Military Service Records

………….

PETERSON, A. M. Cpl - Enl 3 Jun 1861 at Little Rock, AR in the Dallas Rifles. Captured 19 Sep 1863 and sent to Louisville, KY 1 Oct 1863

http://www.couchgenweb.com/civilwar/6thinfcoc.html