The marker for Hampton’s Brigade of Stuart’s Cavalry Division is on the west side of Maryland Route 65 north of Confederate Avenue. (Hagerstown Pike tour map)Hampton's Brigade, Stuart's Cavalry Division, marker 318 of the War Department Confederate markers at Antietam

From the marker:

C.S.A.

Hampton’s Brigade, Stuart’s Cavalry Division

Brig. Gen. Wade Hampton, Commanding.

Organization.
1st North Carolina Cavalry
2nd           Carolina Cavalry*
Cobb’s Legion, Georgia Cavalry
Jeff. Davis Legion

September 17 – 18, 1862

Hampton’s Brigade reached the field on September 17 and took position on the left of Jackson’s Command, occupying, with Lee’s Brigade, a line extending from the left of the Confederate Infantry to the Potomac River.

No. 318.

*This should read “2nd South Carolna Cavalry”