The Seventh SC Cavalry was organized by the War Department on March 18, 1864. While the order was to be effective immediately, the last two companies to arrive would not join the regiment until May. The order directed that the companies of the Holcombe Legion Cavalry Battalion be joined with two companies of Rutledge's Squadron of Mounted Rifles, two companies of Tucker's Squadron, one company of Boykin's Squadron of Mounted Riflemen, and the 2nd company of Trenholm's Squadron, per Special Order Number 65, Adjutant and Inspector General's Office; James River; surrendered 9 April at Appomattox Court House with 22 officers and 398 enlisted men.
7th South Carolina Cavalry Regiment:
Field Officers: Colonel Alexander C. Haskell; Colonel W. P. Shingler; Lieutenant Colonel Isaac G. McKissick; Major Edward M. Boykin
Assignments: Gary's Cavalry Brigade, Department of Richmond, June 1864 - January 1865; Gary's Brigade, F. Lee's Division, Cavalry Corps, Army of Northern Virginia, January - April 1865.
Battles: Petersburg Siege, June 1864 - April 1865; New Market Heights, 29 September 1864; Roper's Farm, 30 September 1864; Sayler's Creek, 6 April 1865; Appomattox Court House, 9 April 1865.
A Company, Marion Men of Winyah, Tucker's Cavalry: Captain John Tucker; Captain John McDonald
B Company, Rutledge Mounted Rifles: Captain William L. Trenholm; A Company, Horse Artillery
C Company: Captain Isaac McKissick; Captain John Palmer
D Company: Captain Alex R. Taylor; B Company Holcombe Legion
E Company: Captain J. Wash. Williams
F Company: Captain W. L. Wallace
G Company: Captain J.J. Magee; Captain Wm. Henry Jeffers
G Company, Rutledge Mounted Rifles: Captain L.J. Walker; B Company, Horse Artillery
H Company, Kirkwood Cavalry, Kirkwood Rangers, Camden Rangers
H Company, Brooks Infantry, Partisan Rangers: Captain Wm. Shannon
I Company: Captain Thomas V. Walsh; Captain Robert C. Webb; Captain J. Franklin Bradford
K Company: Captain Edward M. Boykin