The main event that led the United State to take a more active role in the world affairs was World War II, since the US emerged from this war an economic superpower. It was also clear that some nation needed to "fill the void" left by the relative fall of the British Empire.
Senator Joseph Raymond McCarthy
The 3 significant causes to World War 1 would be:1. Treaty of Versailies, which forces Germans into accepting Full Blame for WWI. 2.This caused Germany to lose a lot of its lands. 3. Forced them to pay restitution for war dameges to countries like France, and Great Britain ect. 4. (just for the info) This made their leader very angry and it started a whole new perspective upon the nations view point.
