1950s

1947–1991 tension between the Soviet Union and the United States and their respective allies

File:1950s decade montage.png|370x370px|thumb|right|Top, L-R: U.S. Marines engaged in street fighting during the Korean War, late September 1950; The first polio vaccine is developed by Jonas Salk.Centre, L-R: US tests its first thermonuclear bomb with code name Ivy Mike in 1952. A 1954 thermonuclear test, code named Castle Romeo; In 1959, Fidel Castro overthrows Fulgencio Batista in the Cuban Revolution, which results in the creation of the first and only communist government in the Western Hemisphere; Elvis Presley becomes the leading figure of the newly popular music genre of rock and roll