The United States did not celebrate the fall of the murderous Khmer Rouge. China, which had been moving closer to Washington since Nixon’s visit in 1973, was allied with Pol Pot. Deng Xiaoping was furious, and unwilling to tolerate what he perceived as Vietnam’s aggression against China’s ally. He resolved to invade Vietnam, and told the US about the plan. President Carter said he could not openly condone an attack but assured Deng he understood that “China cannot allow Vietnam to pursue aggression with impunity,” and he privately promised to support Beijing if the Soviets threatened to assist
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