The correct answer is Turkey. Turkey is in between Europe and Asia, in the east is Europe, while in the west is Asia, which is why Turkey has a mixed culture. It has a lot of connections to different civilizations, since it is in between two continents with different cultures.
I am confused about your question, because neither Truman or Eisenhower were around when Vietnam was happening...
If you clarify, I might be able to answer your question
Egypt Albania Romania Yemen Bulgaria
Answer: x-rays
Explanation: she discovered radium