Did the Vietnamese attack the Gulf of Tonkin during Vietnam war?

Not really. The Gulf of Tonkin is a body of water off the Vietnamese coast. American naval forces operating in the Gulf in 1964 claimed to have come under attack from communist Vietnamese patrol craft, although the truth of what happened remains in much dispute. At the time, the US used the incident as justification to increase its involvement against communist forces in Vietnam, which eventually turned into a huge deployment of US military forces.