On This Day (June 20)

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• 451 – A coalition led by Roman General Flavius Aetius and Visigothic king Theodoric I clashed violently with the Hunnic alliance commanded by Attila the Hun at the Battle of Chalons.
  
  
  The Huns at the Battle of Chalons by Alphonse de Neuville
  
  
• 1685 – Monmouth Rebellion: The Duke of Monmouth declared himself King of England at Bridgwater.
• 1789 – French Revolution: Members of France's Third Estate took the Tennis Court Oath, pledging not to separate until a new constitution was established.
• 1819 - Jacques Offenbach, German-born French composer born. (d. 1880) (Offenbach was a German-born French composer and cellist of the Romantic era and one of the originators of the operetta form. Of German-Jewish descent, he was one of the most influential composers of popular music in Europe in the 19th century, and many of his works remain in the repertory.)
  
  
  CanCan from Orpheus in the Underworld
  
  
• 1837 – Victoria succeeded to the British throne.
• 1893 - Lizzie Borden is acquitted of murdering her stepmother and father.
• 1924 - Audie Murphy, American Medal of Honor recipient and actor born. (d. 1971) (Murphy was an American soldier in World War II, who later became an actor, appearing in 44 American films. He also found success as a country music composer. In 27 months of combat action in World War II, Murphy became the most decorated United States combat soldier in United States military history. He received the Medal of Honor, the U.S. military's highest award for valor, along with 32 additional U.S. medals, five from France, and one from Belgium.)
• 1973 – Snipers fired into a crowd of Peronists near the Ezeiza Airport in Buenos Aires, killing at least 13 people and injuring 365 others.