What happened on June 20 ?

451 - According to some sources, this was the date of the Battle of Chalons: Flavius Aetius' victory over Attila the Hun.

1214 - University of Oxford receives its charter.

1631 - The sack of Baltimore: the Irish village of Baltimore is attacked by Algerian pirates.

1685 - Monmouth Rebellion: The Duke of Monmouth declares himself King of England at Bridgwater.

1756 - British garrison imprisoned in the Black Hole of Calcutta.

1782 - The U.S. Congress adopts the Great Seal of the United States.

1789 - Deputies of the French Third Estate took the Tennis Court Oath.

1791 - The Flight to Varennes began.

1819 - The US vessel Savannah arrives at Liverpool, United Kingdom. She is the first steam-propelled vessel to cross the Atlantic, most of the journey was made under sail.

1837 - Queen Victoria succeeds to the British throne.

1862 - Barbu Catargiu, the Prime Minister of Romania, is assassinated.

1863 - West Virginia is admitted as the 35th U.S. state.

1877 - Alexander Graham Bell installs world's first commercial telephone service in Hamilton, Ontario, Canada.

1893 - Lizzie Borden is acquitted of murdering her stepmother and father.

1919 - 150 die at the Teatro Yaguez fire, Mayagüez, Puerto Rico.

1939 - Benny Goodman's Song School ends its radio series.

1948 - Toast of the Town, later The Ed Sullivan Show, debuts.

1956 - A Venezuelan Super-Constellation crashed in Atlantic Ocean off Asbury Park, New Jersey killing 74 people.

1960 - Independence of Mali and Senegal.

1963 - The so-called "red telephone" is established between Soviet Union and United States following the Cuban Missile Crisis.

1963 - Leave it to Beaver ends.

1966 - Canada sells 336 million bushels (9.14 teragrams) of wheat to Soviet Union.

1969 - Jacques Chaban-Delmas becomes Prime Minister of France.

1973 - Ezeiza massacre in Buenos Aires, Argentina. Snipers fired upon left-wing peronists. At least 13 are killed and more than 300 injured.

1977 - Oil begins to flow through the Trans-Alaska Pipeline System (TAPS).

1980 - Roberto Duran starts his classic boxing trilogy with Sugar Ray Leonard by defeating him in Canada by a decision in 15 rounds, to gain the WBC world Welterweight championship.

1983 - LZW patent filed in USA.

1990 - Asteroid Eureka discovered.

1991 - German parliament decides to move the capital from Bonn back to Berlin.

2000 - Andrea Yates drowns her five children in a bathtub in their Houston, Texas home.

2001 - Pervez Musharraf becomes president of Pakistan.

2003 - LZW patent expires in USA.

2003 - Formation of Wikimedia Foundation announced.