Cambodian Campaign - Repercussions

Repercussions

For more details on the expansion of the PAVN logistical system, see Ho Chi Minh Trail.

The North Vietnamese response to the incursion was to avoid contact with allied forces and, if possible, to fall back westward and regroup. PAVN forces were well aware of the planned attack and many COSVN/B-3 Front military units were already far to the north and west conducting operations against the Cambodians when the offensive began. During 1969 PAVN logistical units had already begun the largest expansion of the Ho Chi Minh Trail conducted during the entire conflict. As a response to the loss of their Cambodian supply route, North Vietnamese forces seized the Laotian towns of Attopeu and Saravane during the year, pushing what had been a 60-mile (97 km) corridor to a width of 90 miles (140 km) and opening the entire length of the Kong River system into Cambodia. A new logistical command, the 470th Transportation Group, was created to handle logistics in Cambodia and the new "Liberation Route" ran through Siem Prang and reached the Mekong at Stung Treng.

As foreseen by Secretary Laird, fallout from the incursion was quick in coming on the campuses of America's universities, as protests erupted against what was perceived as an expansion of the conflict into yet another country. On 4 May the unrest escalated to violence when Ohio National Guardsmen shot and killed four unarmed students (two of whom were not protesters) during the Kent State shootings. Two days later, at the University at Buffalo, police wounded four more demonstrators. On 8 May 100,000 protesters gathered in Washington and another 150,000 in San Francisco on only ten days notice. Nationwide, 30 ROTC buildings went up in flames or were bombed while 26 schools witnessed violent clashes between students and police. National Guard units were mobilized on 21 campuses in 16 states. The student strike spread nationwide, involving more than four million students and 450 universities, colleges and high schools in mostly peaceful protests and walkouts.

Simultaneously, public opinion polls during the second week of May showed that 50 percent of the American public approved of President Nixon's actions. Fifty-eight percent blamed the students for what had occurred at Kent State. On both sides, emotions ran high. In one instance, in New York City on 8 May, pro-administration construction workers rioted and attacked demonstrating students. Such violence, however, was an aberration. Most demonstrations, both pro- and anti-war, were peaceful. On 20 May 100,000 construction workers, tradesmen, and office workers marched peacefully through New York City in support of the president's policies.

Reaction in the U.S. Congress to the incursion was also swift. Senators Frank F. Church (Democratic Party, Idaho) and John S. Cooper (Republican Party, Kentucky), proposed an amendment to the Foreign Military Sales Act that would have cut off funding not only for U.S. ground operations and advisors in Cambodia, but would also have ended U.S. air support for Cambodian forces. On 30 June the United States Senate passed the act with the amendment included. The bill was defeated in the House of Representatives after U.S. forces were withdrawn from Cambodia as scheduled. The newly-amended act did, however, rescind the Southeast Asia Resolution (better known as the Gulf of Tonkin Resolution) under which Presidents Johnson and Nixon had conducted military operations for seven years without a declaration of war.

The Cooper-Church Amendment was resurrected during the winter and incorporated into the Supplementary Foreign Assistance Act of 1970. This time the measure made it through both houses of Congress and became law on 22 December. As a result, all U.S. ground troops and advisors were barred from participating in military actions in Laos or Cambodia, while the air war being conducted in both countries by the U.S. Air Force was ignored.