TABLE 27
Deployment of Divisions and Brigades to Vietnam
| Unit | Date Arrived in Vietnam |
| 1st Cavalry Division | September 1965 |
| 1st Infantry Division | October 1965 |
| 2d Brigade* | July 1965 |
| 4th Infantry Division | October 1965 |
| 2d Brigade* | August 1966 |
| 1st Brigade, 5th Infantry Division | June 1968 |
| 9th Infantry Division | December 1966 |
| 2d Brigade* | January 1967 |
| 23d Infantry Division | September 1967 |
| 11th Infantry Brigade* | December 1967 |
| 196th Infantry Brigade* | August 1966 |
| 198th Infantry Brigade* | October 1967 |
| 25th Infantry Division | April 1966 |
| 2d Brigade* | January 1966 |
| 3d Brigade* | December 1965 |
| 3d Brigade, 82d Airborne Division | February 1968 |
| 101st Airborne Division | December 1967 |
| 1st Brigade* | July 1965 |
| 173d Airborne Brigade | May 1965 |
| 199th Infantry Brigade | December 1966 |
* Arrived separately.
active Army. At peak strength the Army had 19 divisions (counting the 3 brigades attached to the 23d as 1 division), with 7 divisions serving in Vietnam, 2 in Korea, 5 in Europe, and 5 in the United States, and 11 brigades, of which 4 were in Vietnam, 2 in Alaska, 1 in the Canal Zone, and 4 in the continental United States.
Organizational Changes to Units in Vietnam
Airmobility gave commanders the ability to concentrate men and their firepower on the Vietnamese battlefield quickly, and the Army planned to organize a second airmobile division as early as 1966. These plans foundered until 1968 because of the aviation needs of other combat units in Vietnam and the general shortage of aviation equipment. But after the 101st Airborne Division arrived in Southeast Asia, U.S. Army, Vietnam, began a phased reorganization of the division into an airmobile configuration, which took over a year to complete.[1]
During the conversion of the 101st, the Army adopted a decentralized approach to aircraft maintenance. Initially the 101st, like the 1st Cavalry Division, was to have a large aircraft maintenance battalion, but the need of company-, battery-, and troop-size aviation units for their own maintenance organiza-
- ↑ Tolson, Airmobility, pp. 195–98; Msg, ACSFOR, DA, to CinC, USARPAC, 866236, 28 May 68, sub: Second Airmobile Division, 101st Abn Div file, DAMH-HSO.
