How did the motivations for the establishment of the North Atlantic Treaty Organization differ from those for the establishment of the United Nations?

The United Nations (UN) was established as a way for nations to resolve differences and disputes through dialogue in a peaceful non-violent fashion.

The North Atlantic Treaty Organization (NATO) was organized as a defense pact created during the Cold War to protect against military aggression form nations that are not members of NATO, especially the Soviet Union.

The Warsaw Pact consisting of the Soviet Union and its seven Soviet satellite states in Central and Eastern Europe was a defense pact to counter the creation of NATO.