Units Supported by 220th Aviation Company,
from 1965 through 1971
(From various attributable and reliable sources)

Complier's Note: As it becomes available, we plan to add additional information regarding the nature and mutual benefits of support provided each unit.

PATCH/CREST	DESIGNATION OF UNITS SUPPORTED
	ARVN 1st Infantry Division (Primarily Hue area and North of Da Nang)
	ARVN 2nd Infantry Division (Primarily Quang Ngai area and South of Da Nang)
	ARVN I Corps Headquarters (Da Nang)
	1st Marine Division (South of Da Nang—Quang Ngai, Quang Tin and Quang Nam Provinces). Arrived in Chu Lai in August 1965
	1st Marine Aircraft Wing (Based at Chu Lai)
	3nd Marine Division (North of Da Nang—Thua Thien and Quang Tri Provinces)
	Initially deployed as the 3rd Marine Expeditionary Brigade in 1965—then reorganized as the III Marine Amphibious Force in 1966 with 1st Marine Aircraft Wing at Chu Lai, 1st Marine Division at Chu Lai and 3rd Marine Division at Da Nang with a HQ Division (Fwd) at Phu Bai)
	Naval Task Force Clearwater Consisting of Dong Ha River Security Group and Hue River Security Group . TF Clearwater was a riverine force; it was gradually wound down as ground security in the area improved.
	Naval Task Force 116 "River Sailors also gave critical support to allied forces fighting to contain the enemy surge in I Corps. From September to October 1967, River Section 521 and Hunterdon County deployed to the river area south of Danang and to Cau Hai Bay near Hue. PBR units operated permanently in the northern reaches of South Vietnam after 24 February 1968, when COMNAVFORV established Task Force Clearwater, under the operational control of Commanding General III Marine Amphibious Force. The Mission of the task force was to secure the Perfume River which gave access to Hue from the sea and then Cua Viet. The Task Force eased supply efforts to American forces arrayed along the DMZ and holding the besieged outpost at Khe Sanh." [source: Mobile Riverine Force Association
	ARVN 7th Vietnamese Airborne Regiment (part of a Task Force after Tet '68 with the 1st ARVN Infantry Division in the restoration of Hue City)
	173rd Airborne Brigade (US) [with XXIV Corps]
	1st Cavalry Division (US) [TET Offensive 1968—Hue, Quang Tri, Khe Sanh and A Shau until May, possibly June]
	Americal Division (originally Task Force OREGON)—based at Chu Lai
	196th Light Infantry Brigade (US) [with the Americal Division, XXIV Corps]. 196th Light Infantry Brigade belonged to the Americal Division, also known as 23rd Infantry Division. All three light brigades had been activated as independent units for service in Vietnam, then consolidated under the reactivated Americal.
	XXIV Corps (HQ in Phu Bai – later in Da Nang) [Also seen as 24th Corps]
	1st Brigade (Separate), 101st Airborne Division (US)
	101st Airborne Division (Airmobile) [US]
	5th Special Forces Group (US) [Throughout I Corps]
	1st Brigade, 5th Mechanized Division (US)
	3rd Brigade, 82nd Airborne Division (US)
	108th Field Artillery Group (US)
	US Army MACV Advisers (Throughout I Corps)
	Seabees (US) [Throughout I Corps

Compiler's Note: In addition to the Marine aircraft from the 1st MAW, in 1966-67 we worked with many Navy aircraft crews from the USS Kitty Hawk who came in under the ceiling cover when the Air Force from Da Nang (Main) were not able to support the ground forces from their VFR on top locations. We also had an Air Force National Guard unit (in time I hope to recall their type aircraft and where they came from) that came to RVN from the US to join the fight and took missions when the USAF waived off. On many occasions when the USAF, and their TASS as well, were trying to work at least 1000 feet higher than we were operating, the 220th and "others" were there to offer support.