In 1943, the US got involved in the longest war, the Vietnam War. The President during that time was Lyndon Johnson. He had made a campaign with the pretense that he was a pacifist. However, he later on adopted the viewpoint that the war could not be avoided by the US to enter because of what happened in the Gulf of Tonkin. Because there was no adequate proof about the subject, the US navy did not believe the second attack – the Gulf of Tonkin incident was only a justification for the passing of the Gulf of Tonkin Resolution. When Congress passed the resolution, President Johnson was given full military power. That started the US into a long and violent war against the North Vietnamese with millions of casualties based on event that never really occurred. The Gulf of Tonkin Incident was merely a justification for a resolution passed by the US Congress to enter into war against North Vietnam. However, the whole pretense for getting into the war did not happen which makes the Gulf of Tonkin Resolution unconstitutional.
