- 763 – The Byzantine army of emperor Constantine V defeats the Bulgarian forces in the Battle of Anchialus.
- 1422 – Battle of Arbedo between the duke of Milan and the Swiss cantons.
- 1521 – Spanish forces defeat a combined French and Navarrese army at the Battle of Noáin during the Spanish conquest of Iberian Navarre.
- 1559 – King Henry II of France is mortally wounded in a jousting match against Gabriel, comte de Montgomery.
- 1651 – The Deluge: Khmelnytsky Uprising: The Battle of Berestechko ends with a Polish victory.
- 1688 – The Immortal Seven issue the Invitation to William, which would culminate in the Glorious Revolution.
- 1758 – Seven Years’ War: The Battle of Domstadtl takes place.
- 1794 – Northwest Indian War: Native American forces under Blue Jacket attack Fort Recovery.
- 1882 – Charles J. Guiteau is hanged in Washington, D.C. for the assassination of US President James Garfield.
- 1905 – Albert Einstein sends the article On the Electrodynamics of Moving Bodies, in which he introduces special relativity, for publication in Annalen der Physik.
- 1916 – The Battle of the Boar’s Head takes place in Richebourg-l’Avoué . It is known as ‘The Day Sussex Died’.
- 1922 – In Washington D.C., US Secretary of State Charles Evans Hughes and Dominican Ambassador Francisco J. Peynado sign the Hughes–Peynado agreement, which ends the United States occupation of the Dominican Republic.
- 1934 – The Night of the Long Knives, Adolf Hitler’s violent purge of his political rivals in Germany, takes place.
- 1936 – Emperor Haile Selassie of Abyssinia appeals for aid to the League of Nations against Italy’s invasion of his country.
- 1937 – The world’s first emergency telephone number, 999, is introduced in London.
- 1944 – World War II: The Battle of Cherbourg ends with the fall of the strategically valuable port to American forces.
- 1959 – A United States Air Force F-100 Super Sabre from Kadena Air Base, Okinawa, crashes into a nearby elementary school, killing 11 students plus six residents from the local neighbourhood.
- 1960 – Belgian Congo gains independence as Republic of the Congo (Léopoldville).
- 1963 – Ciaculli bombing: a car bomb, intended for Mafia boss Salvatore Greco, kills seven police officers and military personnel near Palermo.
- 1990 – East Germany and West Germany merge their economies.
- 1997 – The United Kingdom transfers sovereignty over Hong Kong to China.
- 2013 – Protests begin around Egypt against President Mohamed Morsi and the ruling Freedom and Justice Party, leading to their overthrow during the 2013 Egyptian coup d’état.
- 2015 – A Hercules C-130 military aircraft with 113 people on board crashes in a residential area in Medan, Indonesia, resulting in at least 116 deaths.
- Armed Forces Day (Guatemala).
- Navy Day (Israel).
- Philippine-Spanish Friendship Day (Philippines).
- 1641 – Meinhardt Schomberg, 3rd Duke of Schomberg, German-English general (d. 1719).
- 1755 – Paul Barras, French soldier and politician (d. 1829).
- 1893 – Walter Ulbricht, German soldier and politician (d. 1973).
- 1907 – Roman Shukhevych, Ukrainian general and politician (d. 1950).
- 1914 – Francisco da Costa Gomes, Portuguese general and politician, 15th President of Portugal (d. 2001).
- 1935 – John Harlin, American pilot and mountaineer (d. 1966).
- 1942 – Robert Ballard, American lieutenant and oceanographer.
- 1785 – James Oglethorpe, English general and politician, 1st Colonial Governor of Georgia (b. 1696).
- 1934 – Karl Ernst, German soldier (b. 1904).
- 1934 – Erich Klausener, German soldier and politician (b. 1885).
- 1934 – Gregor Strasser, German lieutenant and politician (b. 1892).
- 1934 – Kurt von Schleicher, German general and politician, 23rd Chancellor of Germany (b. 1882).
- 1941 – Aleksander Tõnisson, Estonian general and politician, 5th Estonian Minister of War (b. 1875).
- 1971 – Georgy Dobrovolsky Ukrainian pilot and astronaut (b. 1928).
- 1995 – Georgy Beregovoy, Ukrainian general and astronaut (b. 1921).
- 2015 – Charles W. Bagnal, American general (b. 1934).
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