Answer:
The Correct Answer is A
Vietnam War
Explanation:
In foreign policy, Johnson escalated American engagement in the Vietnam War.
In 1964, Congress enacted the Gulf of Tonkin Resolution, which awarded Johnson the authority to use armed force in Southeast Asia without having to request for an authoritative announcement of war.
Thus the war escalated and by 1968 there were over 500,000 troops were fighting in the Vietnam war.
