February 8, 1945 The United States and the Soviet Union attend the Yalta Conference after World War II to talk about what are they going to do with Germany. the three leaders decided to order Germany's unconditional surrender and started plans for a post-war world and spilt germany between them.
The end of the Korean war
August 29, 1949The Soviet Union successfully tests its first atomic bomb, which the U.S. calls Joe 1. In addition to the U.S., there are now two countries in the world with nuclear weapons
North Vietnam invaded South Vietnam.
June 25, 1950 Korea invaded South Korea, starting the Korean War. The U.S. gets involved in the war to try and stop the spread of communism.
The U.S. fails in its attempt to invade Cuba.
March 29, 1951 North and South Korea agree to end fighting in the war. The country is still divided, though, and North Korea remains communist.
December 1956 Communist North Vietnam invades South Vietnam, which is not communist. The United States will eventually join the war in Vietnam to try and stop the spread of communism.
January 1, 1959 Fidel Castro becomes the president of Cuba after a revolution that overthrows Fulgencio Batista. Castro does not say that Cuba is communist, but Cuba becomes an ally of the Soviet Union. April 17, 1961 The U.S., trying to stop communism in Cuba, tries to invade Cuba at the Bay of Pigs. The invasion is a failure and Castro remains in control of the country.