Answer: The Gulf of Tonkin Resolution was passed by Congress.
Step-by-step explanation:
The Joint Resolution for the Maintenance of Peace and Security in Southeast Asia was passed by Congress on August 7, 1964, and signed by President Lyndon B. Johnson on August 10 that same year.
Better known as the Gulf of Tonkin Resolution, it´s how Congress empowered President Johnson to send troops to the South of Vietnam and bomb the North, escalating the war in that country.