Ok, how about some of the stuff that just didn't seem to be very significant at the time, but are real "arm hair raisers" for me at least, all these years later:
The very first "email" was sent between Stanford and UCLA on October 19th on the ARPANET.
Altamont became the antithesis of Woodstock on December 6th.
Ted Hoff and Stanley Mazor invent the microprocessor.
Led Zeppelin is released in the US.
(May 16th)An American teenager known as 'Robert R.' dies in St. Louis, Missouri, of a baffling medical condition. In 1984 it will be identified as the first confirmed case of HIV/AIDS in North America.
(June) The Cuyahoga River fire helps spur an avalanche of water pollution control activities resulting in the Clean Water Act, Great Lakes Water Quality Agreement and the creation of the federal Environmental Protection Agency.
(July) Senator Edward Kennedy drives off a bridge on Chappaquiddick island.
(August) Category 5 Hurricane Camille, the most powerful tropical cyclonic system at landfall in history, hits the Mississippi coast, killing 248 people and causing US$1.5 billion in damage (1969 dollars)
(September) The first automatic teller machine in the United States is installed in Rockville Centre, New York.
Lieutenant William Calley is charged with 6 counts of premeditated murder, for the 1968 My Lai Massacre deaths of 109 Vietnamese civilians in My Lai, Vietnam.
The Chicago Eight trial begins in Chicago, Illinois.
(October) In Chicago, the United States National Guard is called in to control demonstrations involving the radical Weathermen, in connection with the "Chicago Eight" Trial.
Hundreds of thousands of people take part in Moratorium to End the War in Vietnam demonstrations across the United States.
(November)U.S. President Richard Nixon addresses the nation on television and radio, asking the "silent majority" to join him in solidarity with the Vietnam War effort, and to support his policies.
Independent investigative journalist Seymour Hersh breaks the My Lai story.
(December) The first draft lottery in the United States is held since World War II (on January 4, 1970, The New York Times will run a long article, "Statisticians Charge Draft Lottery Was Not Random").