WHAT ALL HAPPENED MARCH TO SEPTEMBER 1971
Find out what all happened March to September 1971

Soyuz program: Soyuz 11 is launched. (6. June 1971)

In Sri Lanka, Janatha Vimukthi Peramuna launches a revolt against the United Front government of Sirimavo Bandaranaike. (5. April 1971)

Ohio ratifies the 26th Amendment to the U.S. Constitution, reducing the voting age to 18, thereby putting the amendment into effect. (30. June 1971)

A midair collision between a Hughes Airwest Douglas DC-9 jetliner and a United States Marine Corps McDonnell Douglas F-4 Phantom II jet fighter near Duarte, California, claims 50 lives. (6. June 1971)

Montagnard troops of South Vietnam revolt against the rule of Nguyen Khanh, killing 70 ethnic Vietnamese soldiers. (19. September 1971)

The Pakistan Army massacres at least 71 Hindus in Burunga, Sylhet, Bangladesh. (26. May 1971)

Apollo program: launch of Apollo 15 on the first Apollo "J-Mission", and first use of a Lunar Roving Vehicle. (26. July 1971)

The Freetown Christiania was founded. (26. September 1971)

Hassan II of Morocco survives an attempted coup d'état, which lasts until June 11. (10. July 1971)

Oman joins the Arab League. (29. September 1971)

President Richard Nixon completes the break from the gold standard by ending convertibility of the United States dollar into gold by foreign investors. (15. August 1971)

Vietnam War: the Battle of Long Khanh between Australian and Vietnamese communist forces begins. (6. June 1971)

Ping-pong diplomacy: In an attempt to thaw relations with the United States, the People's Republic of China hosts the U.S. table tennis team for a week-long visit. (10. April 1971)

The People's Republic of Bangladesh forms, under Sheikh Mujibur Rahman at Mujibnagor. (17. April 1971)

People's Republic of China: Chairman Mao Zedong's second in command and successor Marshal Lin Biao flees the country via plane after the failure of alleged coup against Mao. The plane crashes in Mongolia, killing all aboard. (13. September 1971)

Having weakened after making landfall in Nicaragua the previous day, Hurricane Irene regains enough strength to be renamed Hurricane Olivia, making it the first known hurricane to cross from the Atlantic Ocean into the Pacific. (20. September 1971)

Mariner program: Mariner 9 is launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars. (30. May 1971)

State police and National Guardsmen storm New York's Attica Prison to end a prison revolt. (13. September 1971)

In Washington, D.C., the John F. Kennedy Center for the Performing Arts is inaugurated, with the opening feature being the premiere of Leonard Bernstein's Mass. (8. September 1971)

An attempted coup fails in the African nation of Chad. The Government of Chad accuses Egypt of playing a role in the attempt and breaks off diplomatic relations. (27. August 1971)