PLEASE HELP!!
Select the correct answer from each drop-down menu.
Read this paragraph about the end of the Vietnam War. Choose the correct way to complete each sentence.

After years of fighting to hold back the North Vietnamese Army, the United States ended its direct involvement in the war in 1: 1971 2: 1969 3: 1973
. However, fighting continued between the North and South Vietnamese, and the United States maintained a presence in the region. In April 1975, with the North Vietnamese closing in on 1. Hanoi 2. Da nang 3. Saigon
, the US military began to evacuate American civilians and military personnel. They also evacuated South Vietnamese citizens who had worked with the United States during the war. It became the largest helicopter evacuation in history, evacuating approximately 7,000 people.