The US wanted to make the world into a democratic capitalist utopia, while the Soviet Union wanted to remake the world in the image of communist authoritarianism
The Allies agreed that after WWII, central and eastern European countries would hold free elections, but Stalin kept Soviet troops stationed in those countries, turning them into communist satellite states
The Korean War illustrates that the Cold War involved proxy wars between the US and Soviet Union, as well as being a direct result of the US policy of containment
Shifted tax dollars devoted to defense spending to the Sun Belt states, creating a shift of political power from the Northeast and Midwest to the South and West