For ten points, what was this incident which led to increased US involvement in Vietnam, a confrontation in a body of water off Vietnam's coast?
This incident featured attacks on two American destroyers, although one attack was later proven to be false.  Robert McNamara, despite personal doubts, testified before Congress that these attacks were wholly unprovoked. For ten points, what was this incident which led to increased US involvement in Vietnam, a confrontation in a body of water off Vietnam's coast?
This incident featured attacks on two American destroyers, although one attack was later proven to be false.  
{Gulf of Tonkin} Incident