This likely refers to 15 SC Militia. The Colonel was David Jamison Rumpf or Rumff.
SCDAH has two pension application for soldiers who served in Rumph’s Regiment:
CULLER, Warren V. - Enlisted in January 1865, age 16, under Capt. Wm. Zeigler in Col. D. J. Rumph’s Regiment. Discharged in April, 1865 at Cheraw as a prisoner. Applied for pension in Orangeburg Co. 25 Oct 1919.
ROBINSON, Norman Jacob - Enlisted in Dec 1864 in Co. F, 15th S.C. Militia, Capt. J. W. Zeigler, Discharged in February 1865 at Lancaster. Applied for pension in Orangeburg Co. 26 Apr 1921.
Additionally, one soldier’s widow applied for a pension:
TARRANT, Robert Benson, served in Co. F, 15t h S.C. Militia under Capt. J. W. Zeigler, no dates or places provided. Widow Mrs. M. A. Tarrant Applied for pension in Orangeburg Co. 31 Aug 1926.
Interestingly, attached to Mrs. Benson’s application is a short note from W. V. Culler, which states in part:
“Our commanding officer was Gen. Garlington, Colonel D. J. Rumph was our regimental commander, Jacob Wannamaker was our Adjutant General, and our Captain was J. W. Zeigler. We were captured near Cheraw after having been disbanded and were making our way back home. Our regiment was the 15th. South Carolina. Our company was Co. F.”
As noted previously by Mr. Martin, a brief service record for Martin F. Posey is found on under the general heading Miscellaneous South Carolina Units, M267, reel 0392. Also found in that publication are records for adjutant and lieutenant Jacob G. Wannamaker, and probably others from the regiment. This publication has not been indexed by unit.
Rumpf was variously reported captured at Chesterfield 28 Feb 1865 or Darlington 16 Mar 1865, and transferred to Washington DC 25 Apr 1865, and eventually to Point Lookout, MD. He was aged 54 at the end of the war, place of residence Orangeburg, dark complexion, dark hair, blue eyes, 6 ft. Selected Records of the Ward Department Relating to Confederate Prisoners of War, 1861 - 1865, Roll M598-83, 115, 117. M267.
Rumpf was born and died in Orangeburg County. Based on the above, it appears that at the very end of the war some local Orangeburg men were organized as a militia, though without rosters it’s difficult to tell how many.