In the Vietnam war, the communist north wanted to make the democratic south communist. The soldiers of the north used guerrilla warfare to defeat the south. The U.S soon came in to help the south but failed.
The Space Race was when the Soviet Union and the U.S were racing to get men in space. The Soviet Union got the first man in space but the U.S got the first man on the Moon. The U.S won the space race.
The Berlin Airlift was a thing because the Communists blocked off East Berlin from everywhere else. The U.S dropped off supplies into West Berlin. East Germany didn't let any supplies or people in or out of West Berlin.