The manoeuvre battalions of the Brigade directed their efforts towards strengthening fire support bases and strong points and improving the security of key installations throughout the province.

[1]: 2  Task Force 1st Battalion, 77th Armor Regiment provided security of the Cửa Việt Base including patrols and ambushes north of the Cua Viet River until 9 July 1970.

On 10 May Company D, 1/11th handed responsibility for Firebase Fuller to the Army of the Republic of Vietnam (ARVN) 2nd Regiment, 1st Division and departed the base on foot.

While approaching Firebase Khe Gio they received sniper and mortar fire and a medevac UH-1H crashed into the column killing the four crewmen and two soldiers from D, 1/11th.

From 24 June to 7 July, TF 3/5th provided security for the 14th Engineer Battalion in reconstructing Route 558 from Mai Loc to Firebase Holcomb (16°39′50″N 106°58′55″E / 16.664°N 106.982°E / 16.664; 106.982).

[1]: 3 From 7 to 21 July, TF 1/77th provided security for three artillery units at Vandegrift Combat Base while they supported joint US/ARVN ground operations around Khe Sanh in response to air cavalry contacts.