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 six purposes of the government are as follows:
1- to form a more perfect union.
2- establish justice: by fair and reasonable laws and punishments
3- insure domestic tranquility: this means protecting Americans from other Americans
4- provide a common defense: to protect Americans from any outside forces
5- promote a general welfare for the benefit of citizens
6- secure the blessing of the liberty: this means that citizens have the legal right to life, liberty and pursuing happiness.
