NND Project Number: NND 63316. By: NWD Date: 2011
quarter, thus markedly reducing over-all French Union capabilities for offensive operations in Indochina.
10. As a consequence of the fall of Dien Bien Phu, the morale of the French Union forces would receive a severe blow. Their will to win would be diminished, largely because of a widespread belief that military victory was no longer possible. The loss of morale would probably not be sufficient to reduce the effectiveness of the professional soldiers of the French Expeditionary force. However, a crucial factor in the military situation there after would be the reliability of native units, particularly the Vietnamese. There would almost certainly be an increase in Vietnam desertions, and the possibility cannot be excluded that the native components of French Union forces might disintegrate. However, we believe that such disintegration would be unlikely during the ensuring two or three months, and that for at least this period the major part of the native troops would probably remain loyal. Therefore, we estimate that the impact upon the morale of the French Union forces would be severe, but not of such severity as to preclude their employment as an effective military force during the next two or three months.
11. The fall of Dien Bien Phu would not in itself substantially alter the relative military capabilities of French Union and Viet Minh forces in Indochina during the next two or three months unless there were large-scale desertions from the French Union forces. The victorious Viet Minh troops at Dien Bien Phu would have suffered heavy casualties and their efficiency would be reduced. In order to bring these forces up to full strength, the Viet Minh would probably move them from Dien Bien Phu to their main supply and training areas adjacent to the Red River delta. Prior to the rainy season, this redeployment would require at least three to four weeks. After the full onset of the rainy season, which is unlikely before mid-May, the movement would take between two and three months to complete. We therefore estimate that the bulk of the Viet Minh troops at Dien Bien Phu would not be available for major operations elsewhere in Indochina during the next two or three months, although some lightly-equipped infantry battalions might be made available more rapidly for operations in the Delta region.
12. Although the over-all capabilities of the Viet Minh would be reduced as a consequence of the losses inflicted upon their main striking force, Viet Minh forces elsewhere in Indochina would have the capability during the rainy season to maintain and in some instances increase military pressure against French Union forces. In the Red River delta, they could intensify efforts to sever land communications between Hanoi and Haiphong, ambush French detachments, attack villages, air bases, and other installations, and lay siege to isolated French delta strong points. The scale of Viet Minh operations in the Delta, however, would be restricted by the adverse effects of heavy rains on maneuverability. The Viet Minh could use their force concentrated in the Pleiku region in southern Annam to launch fairly large-scale attacks against French forces engaged in the "Atlante" operation. They could also use units from this force for raiding operations in tile Mekong River area or to reinforce the Viet Minh battalions now in Cambodia. Combat operations in southern Annam, the Mekong valley, and in Cambodia would be restricted by the tenuous nature of resupply of ammunition and other military equipment for these units. The Viet Minh could at the same time organize demonstrations and carry out sabotage and terrorist activities in the major cities of Indochina. The Viet Minh capability in this regard is probably substantial.
13. French Union forces, assuming no major Vietnamese defections, would have the capability to maintain their present major fortified positions in the Delta, and elsewhere maintain control in the major cities, prevent the permanent severing of land communications between Hanoi and Haiphong, repulse Viet Minh attacks in southern Annam and the Mekong River area, and retain the area liberated in the "Atlante" operation. If the Viet Minh were to undertake a major military
SECRET
