| 1975-03-26
The Biological Weapons Convention comes into force.
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| 1975-04-04
Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico
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| 1975-10-01
The Seychelles gain internal self-government. The Ellice Islands split from Gilbert Islands and take the name Tuvalu.
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| 1975-03-25
Faisal of Saudi Arabia is shot and killed by a mentally ill nephew.
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| 1975-07-20
India expels three reporters from The Times, The Daily Telegraph, and Newsweek because they refused to sign a pledge to abide by government censorship.
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| 1975-06-24
An Eastern Air Lines Boeing 727 crashes at John F. Kennedy Airport, New York. 113 people die.
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| 1975-04-09
The first game of the Philippine Basketball Association, the second oldest professional basketball league in the world.
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| 1975-07-30
The Troubles: three members of a popular cabaret band and two gunmen are killed during a botched paramilitary attack in Northern Ireland (see Miami Showband killings).
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| 1975-07-26
Formation of a military triumvirate in Portugal.
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| 1975-03-22
A fire at the Browns Ferry Nuclear Power Plant in Decatur, Alabama causes a dangerous reduction in cooling water levels.
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| 1975-01-08
Ella Grasso becomes Governor of Connecticut, the first woman to serve as a Governor in the United States other than by succeeding her husband.
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| 1975-04-03
Bobby Fischer refuses to play in a chess match against Anatoly Karpov, giving Karpov the title of World Champion by default.
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| 1975-04-21
Vietnam War: President of South Vietnam Nguyen Van Thieu flees Saigon, as Xuan Loc, the last South Vietnamese outpost blocking a direct North Vietnamese assault on Saigon, falls.
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| 1975-12-19
John Paul Stevens is appointed a justice of The United States Supreme Court.
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| 1975-02-09
The Soyuz 17 Soviet spacecraft returns to Earth.
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| 1975-06-25
The State of Emergency is declared in India.
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| 1975-10-16
The Australian Coalition opposition parties using their senate majority, vote to defer the decision to grant supply of funds for the Whitlam Government's annual budget, sparking the 1975 Australian constitutional crisis.
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| 1975-06-07
Sony introduces the Betamax videocassette recorder for sale to the public.
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| 1975-04-09
8 people in South Korea, who were involved in People's Revolutionary Party Incident, are hanged.
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| 1975-07-12
São Tomé and Príncipe declare independence from Portugal.
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| 1975-12-26
The Tupolev Tu-144 goes into service in Soviet Union.
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| 1975-08-04
The Japanese Red Army takes more than 50 hostages at the AIA Building housing several embassies in Kuala Lumpur, Malaysia. The hostages include the U.S. consul and the Swedish chargé d’affaires. The gunmen win the release of five imprisoned comrades and fly with them to Libya.
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| 1975-02-13
A fire breaks out in the World Trade Center in New York City, New York.
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| 1975-08-20
Viking Program: NASA launches the Viking 1 planetary probe toward Mars.
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| 1975-08-11
East Timor: Governor Mário Lemos Pires of Portuguese Timor abandons the capital Dili, following a coup by the Timorese Democratic Union (UDT) and the outbreak of civil war between UDT and Fretilin.
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| 1975-04-30
Fall of Saigon (or Liberation of Saigon from the Communist perspective): Communist forces gain control of Saigon. The Vietnam War formally ends with the unconditional surrender of South Vietnamese president Duong Van Minh.
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| 1975-12-07
Indonesia invades East Timor.
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| 1975-02-21
Watergate scandal: Former United States Attorney General John N. Mitchell and former White House aides H. R. Haldeman and John Ehrlichman are sentenced to prison.
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| 1975-11-20
Francisco Franco, Caudillo of Spain, dies after 36 years in power.
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| 1975-07-30
Jimmy Hoffa disappears from the parking lot of the Machus Red Fox restaurant in Bloomfield Hills, Michigan, a suburb of Detroit, at about 2:30 p.m. He is never seen or heard from again.
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| 1975-04-13
Bus Massacre in Lebanon: Attack by the Phalangist resistance kill 26 militia members of the P.F.L. of Palestine, marking the start of the 15-year Lebanese Civil War.
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| 1975-04-17
The Cambodian Civil War ends. The Khmer Rouge captures the capital Phnom Penh and Cambodian government forces surrender.
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| 1975-04-04
Vietnam War: Operation Baby Lift – A United States Air Force C-5A Galaxy crashes near Saigon, South Vietnam shortly after takeoff, transporting orphans – 172 die.
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| 1975-12-29
A bomb explodes at La Guardia Airport in New York City, killing 11 people and injuring 74.
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| 1975-03-05
First meeting of the Homebrew Computer Club
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| 1975-01-04
Elizabeth Ann Seton becomes the first American-born saint.
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| 1975-10-22
The Soviet unmanned space mission Venera 9 lands on Venus.
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| 1975-12-06
Balcombe Street Siege: An IRA Active Service Unit takes a couple hostage in Balcombe Street, London.
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| 1975-07-06
The Comoros declare independence from France.
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| 1975-04-08
Frank Robinson manages the Cleveland Indians in his first game as major league baseball's first African American manager.
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| 1975-04-29
Vietnam War: Operation Frequent Wind: The U.S. begins to evacuate U.S. citizens from Saigon prior to an expected North Vietnamese takeover. U.S. involvement in the war comes to an end.
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| 1975-05-28
Fifteen West African countries sign the Treaty of Lagos, creating the Economic Community of West African States.
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| 1975-03-10
Vietnam War: North Vietnamese troops attack Ban Me Thuot, South Vietnam, on their way to capturing Saigon.
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| 1975-11-10
The 729-foot-long freighter SS Edmund Fitzgerald sinks during a storm on Lake Superior, killing all 29 crew on board.
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| 1975-01-05
The Tasman Bridge in Tasmania, Australia, is struck by the bulk ore carrier Lake Illawarra, killing twelve people.
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| 1975-05-12
Mayagüez incident: the Cambodian navy seizes the American merchant ship SS Mayaguez in international waters.
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| 1975-10-16
Rahima Banu, a 2-year old girl from the village of Kuralia in Bangladesh, is the last known person to be infected with naturally occurring smallpox.
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| 1975-05-16
Junko Tabei becomes the first woman to reach the summit of Mount Everest.
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| 1975-03-17
The Chicago, Rock Island and Pacific Railroad enters its third and final bankruptcy, and William M. Gibbons is selected as receiver and bankruptcy trustee.
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| 1975-08-23
Successful Communist coup in Laos.
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| 1975-09-08
Gays in the military: US Air Force Tech Sergeant Leonard Matlovich, a decorated veteran of the Vietnam War, appears in his Air Force uniform on the cover of Time magazine with the headline "I Am A Homosexual". He is later given a general discharge.
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| 1975-09-22
Sara Jane Moore tries to assassinate U.S. President Gerald Ford, but is foiled by Oliver Sipple.
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| 1975-10-11
The NBC sketch comedy/variety show Saturday Night Live debuts with George Carlin as the host and Andy Kaufman, Janis Ian and Billy Preston as guests.
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| 1975-06-26
Indira Gandhi establishes emergency rule in India.
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| 1975-05-27
The Dibble's Bridge coach crash near Grassington, North Yorkshire, England kills 32 – the highest ever death toll in a road accident in the United Kingdom.
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| 1975-05-16
India annexes Sikkim after the mountain state holds a referendum in which the popular vote is in favour of merging with India.
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| 1975-09-30
The Hughes (later McDonnell-Douglas, now Boeing) AH-64 Apache makes its first flight.
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| 1975-12-01
Lambda Theta Phi - The first latino fraternity is established in New Jersey.
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| 1975-11-14
Spain abandons Western Sahara.
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| 1975-04-19
India's first satellite Aryabhata is launched.
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| 1975-08-15
Miki Takeo makes the first official pilgrimage to Yasukuni Shrine by an incumbent prime minister on the anniversary of the end of World War II.
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| 1975-07-05
Arthur Ashe becomes the first black man to win the Wimbledon singles title.
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| 1975-10-21
Game 6 of the World Series is played between the Boston Red Sox and Cincinatti Reds. The game would be won on a home run off the left field foul pole at Fenway Park hit by Carlton Fisk in the bottom of the 12th inning, ending perhaps the greatest baseball game played in World Series history.
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| 1975-10-01
Thrilla in Manila: Muhammad Ali defeats Joe Frazier in a boxing match in Manila, Philippines.
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| 1975-04-25
As North Vietnamese forces close in on the South Vietnamese capital Saigon, the Australian Embassy is closed and evacuated, almost ten years to the day since the first Australian troop commitment to South Vietnam.
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| 1975-09-18
Patty Hearst is arrested after a year on the FBI Most Wanted List.
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| 1975-11-25
Suriname gains independence from the Netherlands.
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| 1975-06-25
Mozambique achieves independence.
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| 1975-07-05
Cape Verde gains its independence from Portugal.
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| 1975-09-28
The Spaghetti House siege, in which nine people are taken hostage, takes place in London.
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| 1975-04-28
General Cao Van Vien, chief of the South Vietnamese military, departs for the US as the North Vietnamese Army closed in on victory.
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| 1975-02-04
Haicheng earthquake (magnitude 7.3 on the Richter scale) occurs in Haicheng, Liaoning, China.
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| 1975-08-27
The Governor of Portuguese Timor abandons its capital, Dili, and flees to Atauro Island, leaving control to a rebel group.
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| 1975-09-04
The Sinai Interim Agreement relating to the Arab-Israeli conflict is signed.
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| 1975-11-22
Juan Carlos is declared King of Spain following the death of Francisco Franco.
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| 1975-06-05
The Suez Canal opens for the first time since the Six-Day War.
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| 1975-02-28
A major tube train crash at Moorgate station, London kills 43 people.
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| 1975-09-29
WGPR in Detroit, Michigan, becomes the world's first black-owned-and-operated television station.
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| 1975-09-05
Sacramento, California: Lynette Fromme attempts to assassinate U.S. President Gerald Ford.
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| 1975-11-06
Green March begins: 300,000 unarmed Moroccans converge on the southern city of Tarfaya and wait for a signal from King Hassan II of Morocco to cross into Western Sahara.
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| 1975-09-15
The French département of Corse (the entire island of Corsica) is divided into two: Haute-Corse and Corse-du-Sud.
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| 1975-07-17
Apollo-Soyuz Test Project: An American Apollo and a Soviet Soyuz spacecraft dock with each other in orbit marking the first such link-up between spacecraft from the two nations.
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| 1975-01-19
An earthquake strikes Himachal Pradesh, India
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| 1975-08-01
CSCE Final Act creates the Conference for Security and Co-operation in Europe.
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| 1975-09-16
Papua New Guinea gains its independence from Australia.
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| 1975-11-10
United Nations Resolution 3379: United Nations General Assembly approves a resolution equating Zionism with racism (the resolution is repealed in December 1991 by Resolution 4686).
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| 1975-11-12
The Comoros joins the United Nations.
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| 1975-08-03
A privately chartered Boeing 707 crashes into the mountainside near Agadir, Morocco killing 188.
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| 1975-09-16
The first prototype of the MiG-31 interceptor makes its maiden flight.
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| 1975-11-07
In Bangladesh, a joint force of people and soldiers took part in an uprising led by Col. Abu Taher that ousted and killed Brig. Khaled Mosharraf. The uprising, hailed as National Revolution and Solidarity Day, also helped Gen. Ziaur Rahman (later President of Bangladesh) to get freed from the house arrest that was enforced by Mosharraf four days ago amid a coup d'état.
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| 1975-12-04
Suriname joins the United Nations.
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| 1975-08-15
Bangladesh's founder Sheikh Mujibur Rehman is killed along with most members of his family during a military coup.
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| 1975-06-05
The United Kingdom holds its first and only country-wide referendum, on remaining in the European Economic Community (EEC).
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| 1975-09-16
Cape Verde, Mozambique and Sao Tome and Principe join the United Nations.
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| 1975-10-10
Papua New Guinea joins the United Nations.
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| 1975-11-11
Australian constitutional crisis of 1975: Australian Governor-General Sir John Kerr dismisses the government of Gough Whitlam, appoints Malcolm Fraser as caretaker Prime Minister and announces a general election to be held in early December.
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| 1975-06-26
Two FBI agents and a member of the American Indian Movement are killed in a shootout on the Pine Ridge Indian Reservation in South Dakota; Leonard Peltier is later convicted of the murders in a controversial trial.
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| 1975-03-06
Algiers Accord: Iran and Iraq announce a settlement of their border dispute.
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| 1975-03-27
Construction of the Trans-Alaska Pipeline System begins.
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| 1975-12-02
Pathet Lao seizes power in Laos, and establishes the Lao People's Democratic Republic.
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| 1975-11-28
As the World Turns and The Edge of Night, the final two American soap operas that had resisted going to pre-taped broadcasts, air their last live episodes.
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| 1975-04-02
Vietnam War: Thousands of civilian refugees flee from the Quang Ngai Province in front of advancing North Vietnamese troops.
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| 1975-09-14
The first American saint, Elizabeth Ann Seton, is canonized by Pope Paul VI.
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| 1975-11-27
The Provisional IRA assassinates Ross McWhirter, after a press conference in which McWhirter had announced a reward for the capture of those responsible for multiple bombings and shootings across England.
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| 1975-11-28
East Timor declares its independence from Portugal.
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| 1975-03-06
For the first time, ever, the Zapruder film of the assassination of John F. Kennedy was shown in motion to a national TV audience by Robert J. Groden and Dick Gregory.
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| 1975-04-02
Construction of the CN Tower is completed in Toronto, Ontario, Canada. It reaches 553.33 metres (1,815.4 ft) in height, becoming the world's tallest free-standing structure.
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| 1975-10-16
The Balibo Five, a group of Australian television journalists based in the town of Balibo in the then Portuguese Timor (now East Timor), are killed by Indonesian troops.
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| 1975-10-30
Prince Juan Carlos becomes Spain's acting head of state, taking over for the country's ailing dictator, Gen. Francisco Franco.
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