Taking action through intersectional
1. I would say the Truman doctrine was a response to Chinese communism as President Truman wanted to give European countries economic assistance and resist communism.
2. The Korean War was a result of North Korea invading the south.
3.NASA was founded in response to Soviet technological gains, I believe.
I hope you find these answers useful, I myself have just started this topic
The anwser to your question would be an monarchy
Soviet Union, United States, and Great Britain. Nazi Germany was a part of the Axis Powers.