A Look Back - March 1970

March 1 – Rhodesia severs ties with the United Kingdom, declaring itself a racially segregated republic.
March 5 – The Nuclear Non-Proliferation Treaty goes into effect, after ratification by 43 nations.
March 6 – A bomb being constructed by members of the Weathermen and meant to be planted at a military dance in New Jersey, explodes, killing 3 members of the organization.
March 6 – Süleyman Demirel of AP forms the new government of Turkey (32nd government)
March 12 – Teenagers in the United Kingdom vote for the first time.
March 15 – The Expo '70 World's Fair opens in Suita, Osaka, Japan.
March 16 – The complete New English Bible is published.
March 17 – The United States Army charges 14 officers with suppressing information related to the My Lai massacre.
March 18 – General Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
March 18 – United States Postal Service workers in New York City go on strike; the strike spreads to the state of California and the cities of Akron, Ohio, Philadelphia, Pennsylvania, Chicago, Boston, and Denver, Colorado; 210,000 out of 750,000 U.S. postal employees walk out. President Nixon assigns military units to New York City post offices. The strike lasts 2 weeks.
March 20 – Agency for Cultural and Technical Co-operation (ACCT) (Agence de Coopération Culturelle et Technique).
March 21 – The first Earth Day proclamation is issued by San Francisco Mayor Joseph Alioto.
March 25 – The Concorde makes its first supersonic flight (700 mph 1,127 km/h).
March 31 – NASA's Explorer 1, the first American satellite and Explorer program spacecraft, reenters Earth's atmosphere after 12 years in orbit.
March 31 – Japan Airlines Flight 351, carrying 131 passengers and 7 crew from Tokyo to Fukuoka, is hijacked by Japanese Red Army members. All passengers are eventually freed.