What event led to the 1964 Gulf of Tonkin Resolution?

The Gulf of Tonkin Resolution followed reports in August 1964 that North Vietnamese torpedo boats had attacked U.S. Navy ships in the Gulf of Tonkin. The second reported attack was later disputed, but the reports prompted Congress to give President Lyndon B. Johnson broad authority to use force in Vietnam. Thus, the correct answer is the alleged attack on two U.S. Navy ships by North Vietnamese torpedo boats.

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