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
The battle at Lexington and Concord shaped the american revolution through it was the first victory and battle of the revolution so in this it brought more people to the american cause seeing that their militia were able to take on the world power of Britain and succeed in doing so.
Answer:
because there was a economic crisis in Italy
Answer: In federalist paper no.10, James Madison argues that political parties (or factions) were undesirable but necessary for large countries. The existence of the factions prevents any one person or group from gaining power.
Explanation: Tell me if im correct :)