Answer: They rushed to flee the city.
Step-by-step explanation:
The United States finally bowed to pressure from its citizens and pulled out of the Vietnam war. The South Vietnamese army was nowhere near capable of resisting the North and so with the U.S. gone, the North Vietnamese army captured Saigon, the capital of the South, with relative ease.
As the North captured the South, many South Vietnamese fled the country as they did not want to live under the Communists with the United States assisting with the evacuation of as many people as they could take.