- 18th Corps Aviation Company (1971-73)
- 163rd General Support Company (1968-72)
- 478th Heavy Helicopter Company (1970-71)
- Troop D, 3rd Squadron, 5th Cavalry (1971)
- Troop C, 16th Cavalry (1972-73)
- 7th Squadron, 1st Cavalry Regiment (1968-72) at Vĩnh Long Airfield
- HQ Troop
- A Air Cavalry Troop (1968-72)
- B Air Cavalry Troop (1968-72)
- C Air Cavalry Troop (1968-72)
- D Ground Troop (1968-72)
- 13th Combat Aviation Battalion (1964-72) at Cần Thơ Base Camp & Sóc Trăng Airfield
- 73rd Surveillance Airplane Company (1971)
- 114th Assault Helicopter Company (1964-69) with the Bell UH-1B Iroquois (Huey)
- 121st Assault Helicopter Company (1964-70) with the UH-1B Huey
- 134th Fixed Wing Transport Company (1965-67)
- 147th Assault Helicopter Company (1971-72)
- 162nd Assault Helicopter Company (1969-72)
- 175th Assault Helicopter Company (1966-69) with the UH-1 Huey
- 191st Assault Helicopter Company (1969-71)
- 199th Surveillance Airplane Company (1967)
- 221st Surveillance Airplane Company (1965-67)
- 221st Surveillance Airplane Company (1968-71)
- 235th Assault Helicopter Company (1971)
- 244th Surveillance Airplane Company (1967)
- 271st Medium Helicopter Company (1968)
- 271st Assault Support Helicopter Company (1971) with the Boeing CH-47A Chinook
- 336th Assault Helicopter Company (1966-71) with the UH-1 Huey
- Company A, 101st Aviation Battalion (1965)
- Company A, 502nd Aviation Battalion (1964-66)
- Troop C, 16th Cavalry Regiment (1970-71)
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- 214th Aviation Battalion (1969-71) at Vĩnh Long Airfield
- 114th Assault Helicopter Company (1969-71)
- 135th Assault Helicopter Company (1969-71)
- 175th Assault Helicopter Company (1969-71)
- 199th Reconnaissance Airplane Company (1969-70)
- 221st Reconnaissance Airplane Company (1971)
- 335th Assault Helicopter Company (1969-71)
- 307th Combat Aviation Battalion (1967-71) at Cần Thơ Base Camp
- 73rd Surveillance Airplane Company (1970-71)
- 147th Assault Helicopter Company (1969-71)
- 199th Reconnaissance Airplane Company (1967-69)
- 221st Reconnaissance Airplane Company (1967-68)
- 235th Assault Helicopter Company (1967-71)
- 244th Surveillance Airplane Company (1967-70)
- 271st Assault Support Helicopter Company (1968-71)
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The group HHC was inactivated on 14 March 1973 at Oakland, California.
Redesignated 16 October 1995 as Headquarters and Headquarters Detachment, 164th Aviation Group, and activated in Korea.