1936
Butler v. United States ruling

1939
Congress passes the Hatch Act

1938
House Un-American Activities Committee created

1944
Congress passes Montgomery G.I. Bill

1945
United Nations forms

Nuremberg trials begin

Japan surrenders

1946
Tokyo trials begin

Congress passes Employment Act

1947
Marshall Plan implemented

Doctrine of containment emerges

Truman articulates Truman Doctrine

Congress passes National Security Act

Congress passes Taft-Hartley Act

1948
Israel becomes a nation

Truman orders Berlin airlift

Alger Hiss accused of being a Soviet operative

Truman wins presidential election 

1949
NATO is formed

China falls to Communist forces

1950
Congress passes McCarran Internal Security Bill

Korean War begins

U.S. forces land at Inchon

MacArthur retakes South Korea

Chinese troops force MacArthur back to Seoul

1951
Julius and Ethel Rosenberg convicted of espionage

Truman fires MacArthur

1952
United States develops first hydrogen bomb

Dwight D. Eisenhower is elected president

Jonas Salk develops polio vaccine

1953
Korean War ends with signing of armistice

CIA-backed coup in Iran

1954
Army-McCarthy hearings held

Supreme Court issues Brown v. Board of Education ruling

CIA-backed coup in Guatemala

Dien Bien Phu falls to pro-Communist forces

Geneva Conference splits Vietnam into two countries

SEATO is founded

1955
AFL-CIO forms

Warsaw Pact is signed

1956
Congress passes Federal Highway Act

Suez crisis erupts

USSR puts down Hungarian Revolution

Eisenhower is reelected

1957
Congress passes Civil Rights Act of 1957

Little Rock crisis erupts

Eisenhower Doctrine is announced

USSR launches Sputnik I

1958
Congress passes National Defense Education Act

1959
Congress passes Landrum-Griffin Act

1960
U-2 incident embarrasses U.S. government

John F. Kennedy is elected president

1961
Eisenhower gives farewell address

Soviet-dominated East Germany erects Berlin Wall

Kennedy creates Peace Corps

United States sends “military advisors” to Vietnam

Bay of Pigs invasion fails

1962
Cuban missile crisis erupts

1963
Partial Nuclear Test Ban Treaty signed

Washington-Moscow “hotline” established

Ngo Dinh Diem is overthrown in South Vietnam

Kennedy is assassinated; Lyndon B. Johnson becomes president