5th Arkansas COL David Cross 1861- May 62
COL L. Featherston May 1862-Sep 19, 1863 KIA
COL J E Murray Sept 19 1863-July 22, 1864 KIA
COL Peter V. Green July 64- ???
LTC Howell ??? late in the war
13th Arkansas COL James Tappan 1861- April 1862
COL McNeely APr 62- May 62 resigned
LTC Pollard discharged May 1862
LTC Duncan APr 63- May 64 resigned can't find promotion to COL
LTC Hunt can't find promotion higher than MAJ
so with that said those men in the 5th would have commanded the combined regiments later in the war. The 13th was temporarily consolidated with 15th as well and probably served under their commander. All of this comes from the unit information on FOLD3 and their CSR's.