He was recorded present on the Jan/Feb, 1864 muster roll, the Mar/Apr, 1864 muster roll is missing. He is next recorded present on September 12, 1864. It seems most likely that he was present at Resaca Church in May.

Isaac P. Haynes, Private, Company K, South Arkansas Regiment,* enlisted December 23, 1861 at Camp Benjamin [Benton County, Ark.] by Maj. James H. May for 12 months, wounded at the Battle of Murfreesboro, absent in hospital through February, 1863, present at the Mar/Apr, 1863 and Jan/Feb, 1864 musters, last recorded present on the September 12, 1864 muster, receipted for an issue of clothing September 30, 1864, no further records

* This company subsequently became Company K, 4th Regiment Arkansas Infantry

M317: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Arkansas

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4th's Battles State Date Casualties
Elkhorn AR Mar 7, 8 1862 K5,W36,M14,DW10
Richmond KY Aug 31 1862 K4,W14,DW3
Jackson MS Jul 12 1863 K4,W10
Chickamauga TN Sep 19 20 1863 K10,W37,M8,DW2
Murfreesboro TN Dec 31& Jan 2 1863 K10,W57,M7,DW7
Resaca GA May 13 14 15 1864
New Hope Church GA May 29 to Jun 3 1864
Kennesaw GA Jun 17 to Jul 3 1864
Moore's Mill GA Jul 19 1864
Peach Tree Ck. GA Jul 20 1864
Atlanta GA Jul 22 1864
Ezra Church GA Jul 28 1864
Jonesboro GA Aug 31 1864
Lovejoy Station GA Aug 20 1864
Moon Station Oct 3 1864
Franklin TN Nov 30 1864
Nashville TN Dec 15 16 1864
Sugar Creek Dec 26 1864
Averyborough NC Mar 14 1865
Bentonville NC Mar 19 1865
http://www.rootsweb.ancestry.com/~armontgo/fourth.htm