Answer:
The answer is:
They had come under the threat of communism.
Step-by-step explanation:
After World War II, communism and capitalism had to fight to gain control of a part of the world. In 1948, the Soviet Union started the process to introduce communist governments in the European countries that were under its influence zone. This process would be extended it until 1953, which would safeguard the Soviet interests on the region. In the case of Latin America, it's countries were beneficiated by the war, and the industrialization increased in the region after 1945. However, the social problems, constant economic crisis, and the population suffering from misery was fertile terrain for the socialism ideas, and during the 1950s, several Latin America governments flirted with the Soviet Union, to propose ideas for their countries based on the communism. One of the precepts of Henry Truman's government was to be opposite to the communism no matter where it would be. And considering that Latin America was, somehow, the American backyard, the fear of a communism nation right there was huge. So Truman interfered as more as he could to avoid this threat.