In the period after world war ii, which two sides faced off?

NATO and the Warsaw Pact :^) hope this helped!

In the period after World War 2, NATO (The North Atlantic Treaty Organization) and the Warsaw Pact faced off.  In 1949, the US felt the need to organize something to stop the further expansion of communism.  The Soviet Union, along with other supporters of communism, retaliated with the Warsaw Pact.  
I hope this helps! Can I have Brainliest? :)