1st Cavalry Division Order of Battle during the Vietnam War


Cavalry Battalions (Airmobile Infantry)

• 1st Battalion, 5th Cavalry
• 2nd Battalion, 5th Cavalry
• 1st Battalion, 7th Cavalry
• 2nd Battalion, 7th Cavalry
• 3rd Battalion, 7th Cavalry
• 1st Battalion, 8th Cavalry
• 2nd Battalion, 8th Cavalry
• 1st Battalion, 12th Cavalry
• 2nd Battalion, 12th Cavalry

Aviation Units

11th Aviation Group

• 227th Aviation Battalion (Assault Helicopter)
• 228th Aviation Battalion (Assault Helicopter)
• 229th Aviation Battalion (Assault Helicopter)
• 11th Aviation Company (General Support)
• 17th Aviation Company (Fixed Wing Transport)
• 478th Aviation Company (Heavy Helicopter)

Other Division Air Assets
These companies were used to build the 11th Aviation Group.

• 110th Aviation Company (Aerial Weapons)
• 131st Aviation Company (Aerial Weapons)
• 132nd Aviation Company (Assault Support Helicopter)
• 133rd Aviation Company (Assault Support Helicopter)
• 194th Aviation Company (Assault Helicopter)
• 202nd Aviation Company (Assault Helicopter)
• Company A, 4th Aviation Battalion (Assault Helicopter)
• Company A, 5th Aviation Battalion (Assault Helicopter)
• Aviation Company, 6th Special Forces Group (Assault Helicopter)
• Aviation Company, 7th Special Forces Group (Assault Helicopter)

Division Artillery

• 2nd Battalion, 17th Artillery Regiment (105mm)
• 2nd Battalion, 19th Artillery Regiment (105mm)
• 2nd Battalion, 20th Artillery Regiment (Aerial Rocket)
• 1st Battalion, 21st Artillery Regiment (105mm)
• 1st Battalion, 30th Artillery Regiment (155mm)
• 1st Battalion, 77th Artillery Regiment (105mm)
• Battery E, 82nd Artillery (Aviation)

Division Reconnaissance

• 1st Squad, 9th Cavalry Regiment (Aeriel Recon)
• 11th Pathfinder Company (Provisional)
• Company E, 52nd Infantry (Long Range Recon)
• Company H, 75th Infantry (Ranger)

Division Support Units

• 1st Personnel Service Battalion (Provisional)
• 8th Engineer Battalion
• 13th Signal Battalion
• 15th Medical Battalion
• 15th Supply & Service Battalion
• 15th Transportation Battalion (Aircraft Maintenance)
• 27th Maintenance Battalion
• 15th Administrative Company
• 371st Army Security Agency Company
• 545th Military Police Company
• 26th Chemical Platoon
• 26th Chemical Detachment
• 184th Chemical Platoon
• 14th Military History Detachment
• 191st Military Intelligence Company
• 583rd Military Intelligence Detachment (Interrogation)
• 41st Public Information Detachment
• 42nd Public Information Detachment

Temporarily Assigned

• 1st Battalion, 50th Infantry Regiment (Mechanized)
• 2nd Battalion, 2nd Infantry Regiment (Mechanized)
• 1st Squadron, 11th Armored Cavalry Regiment
• 2nd Squadron, 11th Armored Cavalry Regiment
• 3rd Squadron, 11th Armored Cavalry Regiment
• 25th Infantry Platoon (Scout Dog)
• 34th Infantry Platoon (Scout Dog)
• 37th Infantry Platoon (Scout Dog)
• 54th Infantry Detachment (Ground Radar)
• 6th Infantry Platoon (Combat Tracker)
• 24th Detachment, 5th Weather Squadron
• 31st Detachment, 5th Weather Squadron
• 30th Weather Squadron elements

Primary Sources:
"Vietnam Order of Battle" by Shelby L. Stanton
"Anatomy of a Division: The 1st Cav in Nam" by Shelby L. Stanton
http://en.wikipedia.org/wiki/1st_Cavalry_Division_%28United_States%29 (http://en.wikipedia.org/wiki/1st_Cavalry_Division_%28United_States%29)
http://www.first-team.us/tableaux/chapt_08/ (http://www.first-team.us/tableaux/chapt_08/)

Good Hunting.

MR