Americal Division Order of Battle - Assigned and Attached Units
| Division Infantry | Division Artillery | Division Support | |
| 2d Battalion, 1st Infantry | 6th Battalion, 11th Artillery (105mm) | 23d Medical Battalion | |
| 3d Battalion, 1st Infantry | 1st Battalion, 14th Artillery (105mm) | 23d Supply and Transport Battalion | |
| 4th Battalion, 3rd Infantry | 3d Battalion, 16th Artillery (155mm) | 26th Engineer Battalion | |
| 1st Battalion, 6th Infantry | 3rd Battalion, 18th Artillery (175mm/8" SP) | 523rd Signal Battalion | |
| 1st Battalion, 20th Infantry | 1st Battalion, 82d Artillery (155mm) | 723rd Maintenance Battalion | |
| 3rd Battalion, 21st Infantry | 3d Battalion, 82d Artillery (105mm) | 23rd Administration Company | |
| 4th Battalion, 21st Infantry | Battery G, 55th Artillery (.50-cal MG) | 23rd Administration Company | |
| 4th Battalion, 31st Infantry | 23rd Military Police Company | 1st Battalion, 46th Infantry | Division Reconnaissance |
| 5th Battalion, 46th Infantry | Troop F, 8th Cavalry (Air) | 328th Army Security Agency Company | |
| 1st Battalion, 52nd Infantry | Troop E, 1st Cavalry (Armored) | 635th Military Intelligence Company | |
| Troop E, 1st Cavalry (Armored) | 3rd Military History Detachment | ||
| Division Aviation | Troop F, 17th Cavalry (Armored) | Americal Combat Center (Provisional) | |
| 14th Aviation Battalion (Combat) | Company E, 51st Infantry (Long Range Patrol) | 27th Chemical Detachment | |
| 16th Aviation Group | Company G, 75th Infantry (Ranger) | 87th Chemical Detachment | |
| 123d Aviation Battalion (Airmobile) | AMERICAL Scout Infantry Company (Provisional) | 90th Chemical Detachment | |
| 212th Aviation Battalion (Combat) | Troop H, 17th Cavalry | 10th Public Information Detachment | |
| 31st Public Information Detachment | |||
| Temporary Assignment | |||
| 1st Squadron, 1st Cavalry (Armored) | |||
| Chu Lai Defense Command (Provisional) | |||
23rd Infantry Division (AMERICAL) Formation Assets
| Components | Assets derived from: | ||
| 23d Infantry Division Support Command | 15th Support Brigade | ||
| 23d Administration Company | Company A, 6th Support Battalion | ||
| 23d Supply and Transport Company | 94th Supply and Service Battalion | ||
| 723d Maintenance Battalion | 188th Maintenance Battalion (bulk) | ||
| 26th Engineer Battalion | |||
| 523rd Signal Battalion | 509th Signal Battalion | ||
| Company E, 51st Infantry (Long Range Patrol) | Detachment A (Long Range Patrol)* | ||
| 123rd Aviation Battalion | 161st Aviation Company | ||
| 175th Engineer Company: | |||
| Company B | 555th Engineer Company | ||
| Company C | 6th Engineer Company | ||
| Company D | Company B, 39th Engineer Company | ||
| Company E (Float Bridge) | 554th Engineer Company |
*Provisional long range patrol unit formed from the provisional long range patrol detachment,
196th Infantry Brigade and men with long range patrol experience from the 11th and 198th Infantry Brigades.
This order of battle was obtained from the book entitled "Vietnam Order of Battle" by Shelby L. Stanton, 1986, published by Galahad Books, NY,NY. Refer to page 80.
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