North Vietnam As the North Vietnamese called on the local population to maintain the military lines of communication, labor was drawn away from dike maintenance. The problem was exacerbated by the placement of air defense equipment (AA and GCI) on the dikes and the resulting deterioration caused by the vibration of the guns. North Vietnamese SAMs that missed their mark often fell back to earth before exploding, causing additional damage to the dikes. As the dikes deteriorated, however, the North Vietnamese sought a way to continue to fight the war and maintain the dikes. In order to extract a greater effort from their population, they turned the issue into one that would rally the people, alleging that the United States was bombing the dikes intentionally in order to flood the entire delta. Foreign visitors were provided tours of damaged dikes — photographic coverage indicates that most visitors were taken to the same "damaged" dike over a period of several years — to exploit the issue in the foreign press.
United States President
Richard Nixon and Secretary of State
Henry Kissinger discussed bombing the dike network in a 1972 conversation on
Operation Linebacker II, later published by
Daniel Ellsberg: Nixon: We've got to quit thinking in terms of a three-day strike [in the Hanoi-Haiphong area]. We've got to be thinking in terms of an all-out bombing attack - which will continue until they - Now by all-out bombing attack, I am thinking about things that go far beyond. I'm thinking of the dikes, I'm thinking of the railroad, I'm thinking, of course, the docks. Kissinger: I agree with you. President Nixon: We've got to use massive force.
Two hours later at noon, H. R. Haldeman and Ron Ziegler joined Kissinger and Nixon: President: How many did we kill in Laos? Ziegler: Maybe ten thousand - fifteen? Kissinger: In the Laotian thing, we killed about ten, fifteen. President: See, the attack in the North that we have in mind, power plants, whatever's left - POL [petroleum], the docks. And, I still think we ought to take the dikes out now. Will that drown people? Kissinger: About two hundred thousand people. President: No, no, no, I'd rather use the nuclear bomb. Have you got that, Henry? Kissinger: That, I think, would just be too much. President: The nuclear bomb, does that bother you?...I just want you to think big, Henry, for Christsakes. U.S. investigation into the North Vietnamese claims revealed that U.S. bombing had caused minor damage to the dikes but none of the damaged structures were part of the system protecting Hanoi, and none of the damage was severe enough to cause a major breach. Further complicating matters was the North Vietnamese placement of anti-aircraft radars,
surface to air missiles, and artillery atop dike structures. The dike system was also part of the North Vietnamese transportation network, with roads and rail lines in close proximity to the dikes. Although authorization was given during Operation Linebacker II to attack these sites, only the use of
napalm,
cluster bombs, and other antipersonnel weapons were permitted to be used in an attempt to minimize structural damage. ==International reaction==