officers and noncommissioned officers have been recalled to active
 duty. The largest single source of junior officers is now from
 battlefield commissions.
 D. Infiltration
 9. North Vietnam has the capability to train 75,000-100,000
 men a year for infiltration. By shortening current training cycles
 or increasing the number of units involved in the training of new
 recruits, this number could be substantially increased. Training
 replacements at the rate of 75,000-100,000 annually, however
 would not permit organizing all of them into units and providing
 them with the necessary leadership at the same rate. Theoretically,
 North Vietnam could train and form 24-36 infantry regiments (48,000-72,000
 men) per year, but at this pace there would be a considerable
 reduction in quality. In any case, actual formation and training of
 organized units for infiltration has been well short of this theoretical
 capability.
 10. During 1966 at least 55,000 and possibly as many as
 86,000 North Vietnamese troops were sent into South Vietnam.
 Through July 1966, the bulk of the infiltration was accounted
 for by the introduction of organized infantry regiments, including
 -10-
 
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