In early April 1967
MACV gave instructions to commence the Task Force Oregon plan, which involved the movement of an Army task force to
Đức Phổ and
Chu Lai area to allow the
1st Marine Division to move north to
Danang to support the
3rd Marine Division in northern
I Corps.
COMUSMACV General
William Westmoreland appointed his chief of staff MG
William B. Rosson to command the unit, designated
Oregon after Rosson's home state. MG Rosson reported directly to
III Marine Amphibious Force which controlled I Corps, however he was generally free to manoeuvre his brigades subject to maintaining the defense of
Chu Lai Air Base. On 1 August 1967 the 3rd Brigade, 25th Infantry Division was redesignated the 3rd Brigade,
4th Infantry Division and the 4th Division's original 3rd Brigade, which had been operating with the 25th Infantry Division in
III Corps since entering South Vietnam, was simultaneously redesignated the 3rd Brigade, 25th Infantry Division. As more U.S. Army units arrived in South Vietnam, the 3rd Brigade, 4th Infantry Division and the 1st Brigade, 101st Airborne Division were released back to their parent divisions and two newly arrived brigades, the
11th Infantry Brigade and the
198th Light Infantry Brigade were assigned to Task Force Oregon. In September 1967 Task Force Oregon was redesignated the 23rd Infantry Division (Americal). ==References==