2nd » Rhodesia declares itself a republic, breaking its last links with the British crown.
4th » French submarine 'French submarine Eurydice (S644) e.g Eurydice' explodes underwater, resulting in the loss of the entire 57-man crew.
5th » The Nuclear Non-Proliferation Treaty goes into effect after ratification by 43 nations.
6th » An explosion at the Weather Underground safe house in Greenwich Village kills three.
10th » Vietnam War: Captain Ernest Medina is charged by the U.S. military with My Lai war crimes.
17th » My Lai Massacre: The United States Army charges 14 officers with suppressing information related to the incident.
18th » Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
18th » The U.S. postal strike of 1970 begins, one of the largest Wildcat strike action e.g wildcat strikes in U.S. history.
21st » The first Earth Day proclamation is issued by Mayor of San Francisco Joseph Alioto.
28th » 1970 Gediz earthquake e.g Gediz earthquake: A 7.2 Moment magnitude scale or magnitude earthquake strikes western Turkey at about 23:05 local time, killed 1,086 and injured 1,260.
27th » Mariah Carey, American singer-songwriter, producer, and actress
27th » Brent Fitz, Canadian-American drummer and songwriter (Theory of a Deadman, Union (band) known as Union, Econoline Crush, and Indigenous (band) named Indigenous)
27th » Damian Hampson, Australian footballer
27th » Brendan Hill, English-American drummer (Blues Traveler and Stolen Ogre)
27th » Goran Janus, Slovenian ski jumper and coach
27th » Eleanor Maguire, Irish neuropsychologist
27th » Jarrod McCracken, New Zealand rugby player
27th » Elizabeth Mitchell, American actress
27th » Leila Pahlavi, Iranian daughter of Mohammad Reza Pahlavi (d. 2001)
27th » Uwe Rosenberg, German game designer, created Bohnanza