duolingocom4 duolingocom4 20-10-2017 Social Studies contestada What was the fear of the United States about both Korea and Vietnam at the end of World War II? Question 4 options: They feared the two countries would become communist. They were afraid the two countries would join forces and attack the United States. They were worried the two countries would experience a famine. They were concerned that Europeans countries would step in and partition the land to expand their own territories.