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North Vietnamese and U.S. forces clash
President Johnson faced his first crisis in Vietnam. The Maddox was not hit, and it returned fire on the North Vietnamese boat. Johnson promptly responded to the attack and to other North Vietnamese provocation. -
Ping-pong diplomacy
By 1971, however, both nations were looking to open a dialogue with one another. China’s alliance with the Soviet Union had soured and produced a series of bloody border clashes, and Chairman Mao believed ties with the Americans might serve as a deterrent against the Russians. U.S. President Richard Nixon, meanwhile, had made opening China a top priority of his administration.(https://www.history.com/news/ping-pong-diplomacy)