Answer:
Johnson administration policymakers reported that the incident in the Tonkin Gulf was unprovoked in order to gain Congressional approval for a US military campaign in South Vietnam. They needed this approval to carry out their secret plan to overthrow the Ngo Dinh Diem government, while also showing that the US was taking a strong stand against North Vietnam. The administration believed this would increase their chances of gaining Congressional approval and ultimately unifying North and South Vietnam as one nation
Step-by-step explanation: