Frost's Division at Prairie Grove consisted of:

Parson's Missouri Brigade - Brig Gen Mosby M Parsons
Caldwell's Missouri Infantry Regt
Hunter's Missouri Infantry Regt
Mitchell's Missouri Infantry Regt
Steen's Missouri Infantry Regt
Ponder's Missouri Infantry Regt
Pindall's Sharpshooters
Tilden's Missouri Battery

Shaver's Brigade - Colonel Robert G Shaver
Grinstead's Arkansas Infantry (33rd Ark)
W.C. Adams' Arkansas Infantry (38th Ark)
C.W. Adams' Arkansas Infantry
Roberts' Missouri Battery

There were 2 30th Arkansas Infantry Regiments. One, commanded by Robert A Hart in McRae's Brigade. The other one served east of the Mississippi.