found: Virtual Vietnam Archive operations search, Aug. 17, 2004(Operation Delaware; also known as Lam Son 216; carried out Apr. 18 to May 17, 1968 in the Quang Tri and Thua Thien Provinces, A Shau Valley; 1st Cavalry Division (Airmobile, USA); 1st Brigade USA 5th Battalion, 7th Cavalry (5/7th, USA); 1st Battalion, 7th Cavalry (1/7th, USA); 101st Airborne Division USA; 196th Infantry Brigade; ARVN 3d Regiment, 1st Division; ARVN Airborne Task Force Bravo; combat operation to eliminate PAVN bases used in Tet against Hue)