157. Memorandum From William N. Morell, Jr., of the Central Intelligence Agency to the Presidentʼs Special Assistant (Rostow)1

SUBJECT

  • An Appraisal of the Effects of the First Year of Bombing in North Vietnam
1.
The attached report represents a comprehensive research effort by this Agency and DIA on the effects of Rolling Thunder attack against North Vietnam in 1965, and will, I believe, be of interest to you.
2.
Although the Rolling Thunder program flew many thousands of attack sorties against military and economic targets, the resultant damage was relatively light, in good measure reflecting the restricted nature of the air campaign. North Vietnam reacted vigorously to restore transport facilities essential to maintaining the flow of supplies to the insurgency in South Vietnam. The toll in human casualties, based on fragmentary sample data, is estimated to have been between 11,700 and 14,800, divided about equally between dead and wounded, with a somewhat higher percentage of military as compared to civilian casualties.
3.
The major effect of the attack has been to force Hanoi to cope with disruption to normal economic activity and to divert manpower in significant numbers to war supporting activities. North Vietnam may now require 200,000 full-time workers (or about 10 percent of the non-agriculture labor force) for tasks associated with dispersal and emergency repair and maintenance, and the part-time work of another 100,000.
Bill Morell
Director
Research and Reports
[Page 429]

Attachment

Intelligence Report2

AN APPRAISAL OF THE EFFECTS OF THE FIRST YEAR OF BOMBING IN NORTH VIETNAM3

Summary

The Rolling Thunder program, a systematic but restrained air offensive against selected economic and military targets in North Vietnam, was begun on 2 March 1965. The basic objectives of the air attacks on North Vietnam have been made clear in public statements by the President and other high officials of the US Government. These objectives are (a) to reduce the ability of North Vietnam to support the Communist insurgencies in South Vietnam and Laos; (b) to increase progressively the pressure on North Vietnam to the point where the regime would decide it was too costly to continue directing and supporting the insurgency in the South; and (c) to bolster the confidence and morale of the South Vietnamese.

The US and South Vietnamese air campaign against North Vietnam has been a carefully controlled means of gradual escalation to achieve strictly limited objectives. Consequently, the program has operated under a set of firmly defined ground rules which have limited both the choice of targets and the areas to be bombed. The existence of large restricted areas has effectively insulated almost 80 percent of North Vietnamʼs limited modern industrial economy from air attack; these areas contain 75 percent of the nationʼs population and the most lucrative military supply and LOC targets.

The estimated dollar cost for the restoration of economic and military targets attacked in the Rolling Thunder campaign is less than 10 percent of the value of the economic aid given to North Vietnam in recent years by Communist countries.

[Page 430]
Restoration Costs of Facilities Attacked by the Rolling Thunder Program Million US $
Economic Military Total
Attacks on fixed targets 23.6 26.4 50
Armed reconnaissance missions 12.8 0.7 13
Total 36 27 63

About 57 percent of the total damage—$36 million—is attributable to the destruction of economic targets. This cost has been broadly distributed throughout the economic sector, and no one sector has been forced to bear unacceptably high levels of damage. In terms of national capacity the greatest damage was inflicted on electric power and petroleum storage facilities. These target systems lost 27 and 17 percent, respectively, of their national capacity. In each case, however, the target system has adequate cushion in the form of excess capacity to absorb these attacks, and economic activity could therefore be maintained at almost normal levels.

The damage to military facilities is just over $ 27 million. Almost 60 percent of this damage was to military barracks, but the effect has been negligible. The damage to military targets has shown a definite downward trend since the peak month of July 1965.

The damage to military facilities not only has resulted in losses of equipment but also has prompted the abandonment of installations such as airfields and the dispersal of equipment and supplies normally stored in ammunition and supply depots.

The United States has placed restrictions on the air offensive against North Vietnam in order to minimize civilian casualties. It has been to North Vietnamʼs interest to assert otherwise, however, and propaganda media attempt to give the impression that the air offensive has been a vicious and unrestrained assault on the civilian population, hospitals, schools, and other nonmilitary objectives. Nevertheless, in only one instance have Hanoi officials presumed to provide a total for the number of casualties. In September, Egyptian journalists were told that total casualties were 75,000, including 40,000 killed and 35,000 wounded. No procedures devised in this report for the purpose of estimating casualties can support a figure of this magnitude.

Although the Rolling Thunder program has flown many thousands of attack sorties against targets in North Vietnam, the toll in human casualties has been light. Based on sample data, through the end of 1965, North Vietnamese casualties—both civilian and military—are estimated [Page 431] to have ranged from 11,700 to 14,800, divided about equally between killed and wounded.

Estimated Casualties Resulting from Rolling Thunder
Military Civilian Total
Attacks on fixed targets 3,900 to 4,700 1,700 to 2,400 6,500 to 17,900
Armed reconnaissance missions 2,600 to 3,200 3,500 to 4,500 6,100 to 7,700
Total 6,500 to 7,900 5,200 to 6,900 11,700 to 14,800

About 55 percent of these casualties were military personnel. The civilians killed or injured by armed reconnaissance attacks were for the most part truck drivers or transport and construction workers rather directly engaged in maintaining the logistic pipeline to South Vietnam.

Approximately 3,000 civilian deaths (one-half of total civilian casualties) as a result of military action against North Vietnam is a small number. The impact of 3,000 civilian casualties is slight in a country where over 350,000 persons died in 1965 from other causes and where the accidental deaths alone produced casualties some three to five times greater than those resulting from the Rolling Thunder program.

The economic and military damage sustained has presented an increasing but still moderate bill to Hanoi, which in large measure can be (and has been) passed along to Moscow and Peiping.

The major effect of the attack on North Vietnam has been to force Hanoi to cope with disruption to normal economic activity, particularly in transportation and distribution. Reconstruction efforts have been hampered by difficulties in allocating manpower. The regime has relocated large elements of its urban population. Problems in the distribution of food have appeared, although these problems are not yet pressing. Where the bombing has hurt most has been in its disruption of the road and rail nets and in the very considerable repair effort which became necessary. On the other hand, the regime has been singularly successful in overcoming US interdiction efforts.

An examination of destroyed and damaged facilities shows that only a small number were truly essential to the war effort. The major essential restoration has consisted of measures to keep traffic moving, to keep the railroad yards operating, to maintain communications, and to replace transport equipment and equipment for radar and SAM sites. These measures have probably been effected at a cost of between $4 million and $5 million, or between 5 and 10 percent of the total economic and military damage sustained in North Vietnam to date.

[Page 432]

The ability to react and to offset the effects of the air attacks has not been without its costs. It is estimated that the diversion of manpower to tasks associated with dispersal programs and emergency repair and maintenance of lines of communication throughout North Vietnam may now require the full-time services of 200,000 workers (equivalent to about 10 percent of the nonagricultural labor force) and the part-time impressment of another 100,000. An additional 150,000 people are also obligated, on a part-time basis, to serve in various aspects of civil defense which take them away from their normal pursuits. Thus a significant share of the labor force is diverted in varying degrees to supporting the war in the South. The diversion of labor has been supplemented, particularly in the northern provinces, by Chinese logistic support troops.

In response to the intensified US and Vietnamese air offensive in 1965, all countries of the Communist camp have extended economic assistance as proof of their support. Total assistance extended by China and the USSR in 1965 is on the order of $250 million to $400 million, of which military aid accounted for $150 million to $200 million. This aid is a relatively insignificant drain on the capabilities of both countries.

The USSR is by far the major source of military equipment for North Vietnam, supplying 70 to 95 percent, or $142 million, of the total provided in 1965. The major components of Soviet military aid were SAM sites (15 to 20), antiaircraft guns (1,000 to 1,200), planes (44), motor vehicles (2,600), radar, and jet fuel. Chinaʼs identified military aid, totaling only $11 million, consisted principally of planes (8) and trucks (1,400). In addition, large amounts of infantry weapons and ammunition are provided by Communist China. The inclusion of the cost of this equipment would probably raise the value of Chinaʼs total contribution by a few million dollars. Military aid from the Eastern European Communist countries—consisting principally of small arms and ammunition, medicines and medical equipment, and some trucks—is valued at only a few million dollars.

[Here follows the body of the 146-page report.]

  1. Source: Johnson Library, National Security File, Memos to the President—Walt W. Rostow, vol. 7. Top Secret; [codeword not declassified]. The memorandum and attachment were forwarded to the President on June 16.
  2. Source: Johnson Library, National Security File, Country File, Vietnam, 3 H (1), Appraisal of Bombing of NVN-CIA/DIA. Top Secret; [codeword not declassified]. Prepared by the CIA and DIA.
  3. Covering the period from 2 March through 31 December 1965. [Footnote in the source text.]