- AD 81 – Domitian becomes Emperor of the Roman Empire upon the death of his brother Titus.
- 629 – Emperor Heraclius enters Constantinople in triumph after his victory over the Persian Empire.
- 786 – “Night of the three Caliphs”: Harun al-Rashid becomes the Abbasid caliph upon the death of his brother al-Hadi. Birth of Harun’s son al-Ma’mun.[1]
- 919 – Battle of Islandbridge: High King Niall Glúndub is killed while leading an Irish coalition against the Vikings of Uí Ímair, led by King Sitric Cáech.
- 1180 – Genpei War: Battle of Ishibashiyama in Japan.
- 1402 – Battle of Homildon Hill results in an English victory over Scotland.
- 1607 – Flight of the Earls from Lough Swilly, Donegal, Ireland.
- 1682 – Bishop Gore School, one of the oldest schools in Wales, is founded.
- 1723 – Grand Master António Manoel de Vilhena lays down the first stone of Fort Manoel in Malta.
- 1741 – George Frideric Handel completes his oratorio Messiah.
- 1752 – The British Empire adopts the Gregorian calendar, skipping eleven days (the previous day was September 2).
- 1763 – Seneca warriors defeat British forces at the Battle of Devil’s Hole during Pontiac’s War.
- 1782 – American Revolutionary War: Review of the French troops under General Rochambeau by General George Washington at Verplanck’s Point, New York.
- 1791 – The Papal States lose Avignon to Revolutionary France.
- 1808 – Finnish War: Russians defeat the Swedes at the Battle of Oravais.
- 1812 – Napoleonic Wars: The French Grande Armée enters Moscow. The Fire of Moscow begins as soon as Russian troops leave the city.
- 1814 – Battle of Baltimore: The poem Defence of Fort McHenry is written by Francis Scott Key. The poem is later used as the lyrics of The Star-Spangled Banner.
- 1829 – The Ottoman Empire signs the Treaty of Adrianople with Russia, thus ending the Russo-Turkish War.
- 1846 – Jang Bahadur and his brothers massacre about 40 members of the Nepalese palace court.
- 1862 – American Civil War: The Battle of South Mountain, part of the Maryland Campaign, is fought.
- 1901 – U.S. President William McKinley dies after being mortally wounded on September 6 by anarchist Leon Czolgosz and is succeeded by Vice President Theodore Roosevelt.
- 1914 – HMAS AE1, the Royal Australian Navy‘s first submarine, is lost at sea with all hands near East New Britain, Papua New Guinea.
- 1917 – The Russian Empire is formally replaced by the Russian Republic.
- 1936 – Raoul Villain, who assassinated the French Socialist Jean Jaures, is himself killed by Spanish Republicans in Ibiza.
- 1939 – World War II: The Estonian military boards the Polish submarine ORP Orzeł in Tallinn, sparking a diplomatic incident that the Soviet Union will later use to justify the annexation of Estonia.
- 1940 – Ip massacre: The Hungarian Army, supported by local Hungarians, kill 158 Romanian civilians in Ip, Sălaj, a village in Northern Transylvania, an act of ethnic cleansing.
- 1943 – World War II: The Wehrmacht starts a three-day retaliatory operation targeting several Greek villages in the region of Viannos, whose death toll would eventually exceed 500 persons.
- 1944 – World War II: Maastricht becomes the first Dutch city to be liberated by allied forces.
- 1948 – The Indian Army captures the city of Aurangabad as part of Operation Polo.
- 1954 – In a top secret nuclear test, a Soviet Tu-4 bomber drops a 40 kiloton atomic weapon just north of Totskoye village.
- 1958 – The first two German post-war rockets, designed by the German engineer Ernst Mohr, reach the upper atmosphere.
- 1959 – The Soviet probe Luna 2 crashes onto the Moon, becoming the first man-made object to reach it.
- 1960 – The Organization of Petroleum Exporting Countries (OPEC) is founded.
- 1960 – Congo Crisis: Mobutu Sese Seko seizes power in a military coup, suspending parliament and the constitution.
- 1975 – The first American saint, Elizabeth Ann Seton, is canonized by Pope Paul VI.
- 1979 – Afghan President Nur Muhammad Taraki is assassinated upon the order of Hafizullah Amin, who becomes the new president.
- 1982 – President-elect of Lebanon Bachir Gemayel is assassinated.
- 1984 – Joe Kittinger becomes the first person to fly a gas balloon alone across the Atlantic Ocean.
- 1985 – Penang Bridge, the longest bridge in Malaysia, connecting the island of Penang to the mainland, opens to traffic.
- 1989 – The Standard Gravure shooting where Joseph T. Wesbecker, a 47-year old pressman, killed 8 people and injured 12 people at his former workplace, Standard Gravure, before committing suicide.
- 1992 – The Constitutional Court of Bosnia and Herzegovina declares the breakaway Croatian Republic of Herzeg-Bosnia to be illegal.
- 1993 – Lufthansa Flight 2904, an Airbus A320, crashes into an embankment after overshooting the runway at Okęcie International Airport (now Warsaw Chopin Airport), killing two people.[2]
- 1994 – The Major League Baseball season is canceled because of a strike.
- 1997 – Eighty-one killed as five bogies of the Ahmedabad–Howrah Express plunge into a river in Bilaspur district of Madhya Pradesh, India.
- 1998 – Telecommunications companies MCI Communications and WorldCom complete their $37 billion merger to form MCI WorldCom.
- 1999 – Kiribati, Nauru and Tonga join the United Nations.
- 2000 – Microsoft releases Windows Me.
- 2001 – Historic National Prayer Service held at Washington National Cathedral for victims of the September 11 attacks. A similar service is held in Canada on Parliament Hill, the largest vigil ever held in the nation’s capital.
- 2003 – In a referendum, Estonia approves joining the European Union.
- 2007 – Financial crisis of 2007–2008: The Northern Rock bank experiences the first bank run in the United Kingdom in 150 years.
- 2015 – The first observation of gravitational waves is made, announced by the LIGO and Virgo collaborations on 11 February 2016.
- 2019 – Yemen’s Houthi rebels claim responsibility for an attack on Saudi Arabian oil facilities.[3][4]
-Source: wikipedia