 According to Colonel Robert G. Shaver's report on the Battle of Prairie Grove, the 38th was ordered to support Colonel Dandridge McRae's Brigade during the fight at Prairie Grove.After Prairie Grove the unit retreated to Van Buren, with the rest of Hindman's Army.On February 28, 1863, Brigadier General J. C. Tappan, formerly commander of the 13th Arkansas Infantry Regiment, was ordered to assume command of Shaver's brigade, consisting of the 38th Arkansas Infantry Regiment, commanded by Colonel Robert G. Shaver, the 27th Arkansas Infantry Regiment commanded by Colonel James R. Shaler, and the 33rd Arkansas Infantry Regiment commanded by Colonel Hiram L. Grinstead.