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The Gulf of Tonkin is known to be located closest to the former nation of North Vietnam.
Where was the Gulf of Tonkin?
It was located in the South China Sea and was closest to North Vietnam which was a Communist country.
When a U.S. Navy vessel was attacked here, it gave the U.S. government the justification it needed to get more involved in Vietnam.
Find out more on the Gulf of Tonkin incident at https://brainly.com/question/2876334.