E. LOCa*
 13. Supplies for Communist forces move into South Vietnam
 by various means. In North Vietnam, truck, rail, and water transport
 is used to bring supplies through Military Region 4 (MR-4).
 From there, most of it is trucked through Laos, although some use
 of waterways is also made in Laos. Some supplies move directly
 across the DMZ, and some are moved by sea. In addition, some
 supplies from Cambodia enter South Vietnam directly while others
 are routed through Laos.
 14. Roads. The Communist logistical roadnet in MR-4 in
 North Vietnam and in Laos was improved over the past year. In
 general, the improvements, although they have increased the
 tonnage capacities, were primarily designed to provide additional
 flexibility for the system and better year round movement. One
 development was the extension of a new motorable road from Laos
 directly into the A Shau Valley of South Vietnam. In addition,
 the administration and operational control of the LOCs have been
 improved and expanded. The capacity of the entire system for
 delivery of supplies to South Vietnam through Laos continues to
 * See map.
 -15-
 
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