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|José Celso Barbosa Day in Puerto Rico||lots of CN tags|
|1663 – The Parliament of England passed the second of the Navigation Acts, which required that all goods bound for the American colonies had to be sent in English ships from English ports.||needs more footnotes|
|1694 – A Royal Charter was granted to the Bank of England as the English Government's banker.||refimprove section|
|1789 – The U.S. State Department, then known as the Department of Foreign Affairs, became the first federal agency created under the Constitution.||refimprove section|
|1794 – The National Convention ordered the arrest and execution of Reign of Terror leader Maximilien Robespierre after he encouraged the execution of more than 17,000 "enemies of the French Revolution".||refimprove section|
|1865 – A group of Welsh settlers arrived at Chubut Valley in Argentina's Patagonia region.||needs more footnotes|
|1880 – Second Anglo-Afghan War: Afghan forces led by Ayub Khan defeated the British Army near Maiwand, Afghanistan.||refimprove section|
|1914 – Felix Manalo established the modern-day Iglesia ni Cristo religion, an independent, nontrinitarian Christian church, in the Philippines.||primary sources|
|1921 – University of Toronto researchers led by Frederick Banting proved that the hormone Insulin regulates Blood sugar.||unreferenced section|
|1940 – Bugs Bunny debuted in the Animated cartoon A Wild Hare.||refimprove section|
|1996 – A pipe bomb exploded during the Summer Olympics in Atlanta, Georgia, U.S., killing two people and injuring 111 others.||refimprove|
- 1054 – Siward, Earl of Northumbria, led an invasion of Scotland and defeated Macbeth, in a battle north of the Firth of Forth.
- 1302 – Byzantine–Ottoman Wars: The Ottoman sultanate gained its first major victory against the Byzantine Empire in the Battle of Bapheus in Bithynia.
- 1689 – First Jacobite Rising: A Jacobite force of Scots and Irish won a stunning victory against the Williamite government.
- 1778 – The Battle of Ushant, the first meeting between French and British fleets in the American Revolutionary War, ended indecisively and led to political disputes in both countries.
- 1916 – British mariner Charles Fryatt was executed at Bruges, Belgium, after a Court-martial found him to be a franc-tireur.
- 1919 – Red Summer: Race riots erupted in Chicago after a racial incident occurred on a South Side beach, leading to 38 fatalities and 537 injuries over a five-day period.
- 1942 – Second World War: Allied forces halted the Axis invasion of Egypt.
- 1955 – After straying into Bulgarian airspace, El Al Flight 402 was shot down by two MiG-15 fighters, resulting in the deaths of all 58 aboard.
- 1990 – Members of Jamaat al Muslimeen attempted to overthrow the government of Trinidad and Tobago by taking hostages at the Red House including Prime Minister A. N. R. Robinson, before surrendering six days later.
- 2007 – While covering a police pursuit in Phoenix, Arizona, U.S., two news helicopters collided in mid-air, killing both crews.
- Born/died: Jeanne Baret (b. 1740) Hannah Primrose, Countess of Rosebery (b. 1851) Elizabeth Rona (d. 1981)
- 678 – Sclaveni attackers were forced to give up their siege of the Byzantine city of Thessalonica, being unable to penetrate the city's defenses.
- 1214 – Philip II of France decisively won the Battle of Bouvines, the conclusive battle of the 1213–1214 Anglo-French War.
- 1949 – The De Havilland Comet, the world's first commercial Jet airliner to reach production, made its maiden flight.
- 1953 – An armistice was signed (pictured) to end hostilities in the Korean War, officially making the Division of Korea indefinite by creating an approximately 4 km (2.5 mi) wide demilitarized zone across the Korean Peninsula.
- 2002 – A Ukrainian Air Force Sukhoi Su-27 aircraft crashed during an aerobatics presentation at an airshow near Lviv, Ukraine, killing 77 people and injuring over 500 others.