Which event led to the Gulf of Tonkin Resolution?

The Gulf of Tonkin Resolution followed reports that North Vietnamese forces had attacked U.S. Navy ships in the Gulf of Tonkin in August 1964. The reported attacks—especially the second one, which is now considered doubtful—prompted Congress to authorize expanded U.S. military action in Vietnam. The correct choice is an alleged attack on two U.S. Navy ships by North Vietnam.

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