Here are the answers to your questions based on the context of the Vietnam War:
Question 1: What is the reason the United States sent troops to Vietnam?
Response: The US hoped to help the anticommunist government in power.
Question 2: What happened in 1964 as a result of the reinstated military drafts?
Response: Opponents of the war refused to register, burned their draft cards, moved, or made up health conditions.
Question 3: Which of the following is considered a turning point because public opinion in the United States turned against the war in the Vietnam War?
Response: Tet Offensive.
Question 4: In 1968 during the Vietnam War, American soldiers carried out a mass murder of civilians, including women and children. This horrified many Americans and confirmed their belief that the war was unjust. What was the name of this event?
Response: the My Lai Massacre.