Congress was told that against American Warships took place in the Gulf of Tonkin in early August 1964.
one attack
two attacks
three attacks
four attacks

two attacks

Explanation:

the the gulf of Tonkin incident complex naval event in the gulf of tonki off the coast of Vietnam that was presented to the US Congress on August 5th 1964 as two unprovoked attacks by North Vietnamese torpedo boats on the destroyer of madoks and Turner joy of the US 7th fleet

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.