It was "The Farmers' Alliances."
Answer:
One of the main arguments used to support US military involvement in Vietnam was the fear that if Vietnam fell to communism, other nations in Southeast Asia could as well.
Answer: Columbus thought he had discovered India.
Explanation:
This was actually a surprising factor because after discovering America, it turned out that Columbus all along thought he had discovered India. That is why the native population was called Indians. After the first expedition, Columbus visited America twice more. The original expedition sailed to the Bahamas, and the next two led by Columbus ended up in Cuba and Haiti.