C. Chiles, J W. Chiles, Joel F. Chiles
Enlisted as Privates in
Company E, 12th Missouri Cavalry

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

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C. Chiles, Private, Company E, Shank’s Regiment Missouri Cavalry,* enlisted August 15, 1862 in Jackson County by Col. Thompson, wounded in the battle at Helena, Arkansas, July 4, 1863, recorded on the Jan/Feb, 1864 muster roll as absent, on sick furlough since September 22, 1863, no further records

Note, there are no subsequent muster rolls in the records which precludes knowledge of his later service

* This regiment appears to have been variously known on the field as 2nd Regiment Missouri Cavalry, Jeans’ Regiment Missouri Cavalry, and Shank’s Regiment Missouri Cavalry; but it was designated by the Confederate War Department as the 12th Regiment Missouri Cavalry

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J. W. Chiles, Private, Company E, Jean’s Regiment, Missouri Cavalry,* recorded on the February, 1863 Regimental Return, dated January 26 at Camp Carter, Ar., as deserted, no further records

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Joel F. Chiles, Private, Company E, Jean’s Regiment, Missouri Cavalry,*
recorded on the February, 1863 Regimental Return, dated January 26 at Camp Carter, Ar., as deserted, no further records

M322: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Missouri

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12th Missouri Cavalry Rgt.

Col. David Shanks, LtCol. William H. Erwin,
Majs. Samuel Bowman, H. J. Vivien

The regiment, formerly the Jackson County Cavalry, was organized in the
summer of 1863. The unit was in Shelby's brigade and confronted the
Federals in Missouri and Arkansas. It lost two men at Marks' Mills,
Ark. and lost 35 men during Price's 1864 Missouri expedition.

As of May 3, 1864 it reported 35 officers and 292 enlisted present.

It was included in the June 2, 1865 surrender of the Trans-Mississippi
Department.

Submitted by: John Heseltine
Source: Historical Data Systems, Inc.

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This regiment was nicknamed the "Jackson's County Cavalry" since a majority of its men came from the Jackson county area of western Missouri. First commanded by Col. Upton Hays, and later by Colonels Beal G. Jeans and David Shanks. It was also commonly called "Shank's Missouri Cavalry".
http://www.missouridivision-scv.org/mounits/12mocav.htm

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Here is an old, lengthily thread on this regiment. There may be some mention of your man.

http://history-sites.com/cgi-bin/bbs62x/mocwmb/webbbs_config.pl?md=read;id=10939