20
September
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September 20 in History
2003
Maldives civil unrest: the death of prisoner Hassan Evan Naseem sparks a day of rioting in Malé.
2002
The Kolka-Karmadon rock/ice slide.
2001
In an address to a joint session of Congress and the American people, U.S. President George W. Bush declares a "war on terror".
2000
The British MI6 Secret Intelligence Service building is attacked by a Russian-built Mark 22 anti-tank missile.
1990
South Ossetia declares its independence from Georgia.
1984
A suicide bomber in a car attacks the U.S. embassy in Beirut, Lebanon, killing twenty-two people.
1982
The National Football League players begin a 57-day strike.
1979
1977
1973
Billie Jean King beats Bobby Riggs in The Battle of the Sexes tennis match at the Houston Astrodome in Houston, Texas.
1970
Syrian tanks roll into Jordan in response to continued fighting between Jordan and the fedayeen.
1967
{{RMS|Queen Elizabeth 2||}} is launched at John Brown & Company, Clydebank, Scotland. It is operated by the Cunard Line.
1962
James Meredith, an African-American, is temporarily barred from entering the University of Mississippi.
1954
New Zealand's Special Committee on Moral Delinquency in Children and Adolescents reports just ten days after concluding hearings.
1946
The first Cannes Film Festival is held.
1942
Holocaust in Letychiv, Ukraine. In the course of two days the German SS murders at least 3,000 Jews.
1930
Syro-Malankara Catholic Church is formed by Archbishop Mar Ivanios.
1920
Foundation of the Spanish Legion.
1906
Cunard Line's {{RMS|Mauretania|1906|6}} is launched at the Swan Hunter & Wigham Richardson shipyard in Newcastle upon Tyne, England.
1891
The first gasoline-powered car debuts in Springfield, Massachusetts, United States.
1881
Chester A. Arthur is inaugurated as the 21st President of the United States following the assassination of James Garfield.
1871
Bishop John Coleridge Patteson is martyred on the island of Nukapu, a Polynesian outlier island now in the Temotu Province of the Solomon Islands. He is the first bishop of Melanesia.
1870
''Bersaglieri'' corps enter Rome through the ''Porta Pia'' and complete the unification of Italy.
1863
American Civil War: The Battle of Chickamauga ends.
1860
1857
The Indian Rebellion of 1857 ends with the recapture of Delhi by troops loyal to the East India Company.
1854
Battle of Alma: British and French troops defeat Russians in the Crimea.
1848
The American Association for the Advancement of Science is created.
1835
Farroupilha's Revolution begins in Rio Grande do Sul, Brazil.
1792
French troops stop allied invasion of France, during the War of the First Coalition at Valmy.
1737
The finish of the Walking Purchase which forces the cession of 1.2 million acres (4,860 km²) of Lenape-Delaware tribal land to the Pennsylvania Colony.
1697
The Treaty of Rijswijk is signed by France, England, Spain, the Holy Roman Empire and the Dutch Republic ending the Nine Years' War (1688–97).
1633
Galileo Galilei is tried before the Congregation for the Doctrine of the Faith for teaching that the Earth orbits the Sun.
1596
Diego de Montemayor founds the city of Monterrey in New Spain.
1519
Ferdinand Magellan sets sail from Sanlúcar de Barrameda with about 270 men on his expedition to circumnavigate the globe.
1378
Cardinal Robert of Geneva, called by some the Butcher of Cesena, is elected as Avignon Pope Clement VII, beginning the Papal schism.
1260
the Great Prussian Uprising among the old Prussians begins against the Teutonic Knights.
1187
Saladin begins the Siege of Jerusalem.
451
The Battle of Châlons takes place in North Eastern France. Flavius Aetius's victory over Attila the Hun in a day of combat, is considered to be the largest battle in the ancient world.