October 23
Events
Pre-1600
- 4004 BC - James Ussher's purported creation date of the world according to the Bible.
- 42 BC - Liberators' civil war: Mark Antony and Octavian decisively defeat an army under Brutus in the second part of the Battle of Philippi, with Brutus committing suicide and ending the civil war.
- 425 - Valentinian III is elevated as Roman emperor at the age of six.
- 502 - The Synodus Palmaris, called by Gothic king Theoderic, absolves Pope Symmachus of all charges, thus ending the schism of Antipope Laurentius.
- 1086 - Spanish Reconquista: At the Battle of Sagrajas, the Almoravids defeat the Castilians, but are unable to take advantage of their victory.
- 1157 - The Battle of Grathe Heath ends the Danish Civil War.
- 1295 - The first treaty forming the Auld Alliance between Scotland and France against England is signed in Paris.
- 1448 - Scotland wins a decisive victory over England at the Battle of Sark, the last pitched battle to be fought between the two kingdoms during the Medieval period.
1601–1900
- 1641 - Irish Catholic gentry from Ulster attempt to seize control of Dublin Castle, the seat of English rule in Ireland, so as to force concessions.
- 1642 - The Battle of Edgehill is the first major battle of the English Civil War.
- 1666 - The most intense tornado on record in English history, an F4 storm on the Fujita scale or T8 on the TORRO scale, strikes the county of Lincolnshire, with winds of more than.
- 1707 - The First Parliament of the Kingdom of Great Britain convenes.
- 1798 - The forces of Ali Pasha of Janina defeat the French and capture the town of Preveza in the Battle of Nicopolis.
- 1812 - General Claude François de Malet begins a conspiracy to overthrow Napoleon, claiming that the Emperor died in the Russian campaign.
- 1850 - The first National Women's Rights Convention begins in Worcester, Massachusetts.
- 1856 - Second Opium War: Dissatisfied with imperial commissioner Ye Mingchen's reparations for the alleged slighting of a British-owned vessel and at Consul Harry Parkes's urging, British Rear-Admiral Michael Seymour launches an assault on the Barrier Forts outside Canton in the first military engagement of the Second Opium War.
- 1864 - American Civil War: The Battle of Westport is the last significant engagement west of the Mississippi River, ending in a Union victory.
- 1868 - Meiji Restoration: Having taken the shogunate's seat of power at Edo and declared it his new capital as Tokyo, Mutsuhito proclaims the start of the new Meiji era.
- 1882 - Assommoir bombing: Anarchists such as Fanny Madignier commit the first deadly anarchist attack in France.
1901–present
- 1906 - Alberto Santos-Dumont flies an airplane in the first heavier-than-air flight in Europe.
- 1911 - The Italo-Turkish War sees the first use of an airplane in combat when an Italian pilot makes a reconnaissance flight.
- 1912 - First Balkan War: The Battle of Kumanovo between the Serbian and Ottoman armies begins.
- 1923 - German October: Due to a miscommunication with the party leadership, a militant section of the Communist Party of Germany launches an insurrection in Hamburg.
- 1924 - Second Zhili–Fengtian War: Warlord Feng Yuxiang, with the covert support of the Empire of Japan, stages a coup in Beijing against his erstwhile superiors in the Zhili clique, crippling their nearly victorious war effort against the Fengtian clique and forcing them to withdraw from northern China.
- 1927 - The Imatra Cinema is destroyed in a fire in Tampere, Finland, during showing the 1924 film Wages of Virtue; 21 people die in the fire and almost 30 are injured.
- 1940 - Adolf Hitler and Francisco Franco meet at Hendaye to discuss the possibility of Spain entering the Second World War.
- 1941 - The Holocaust: Nazi Germany prohibits Jews from emigrating, including in its occupied territories.
- 1942 - World War II: Allied forces commence the Second Battle of El Alamein, which proves to be the key turning point in the North African campaign.
- 1942 - All 12 passengers and crewmen aboard American Airlines Flight 28 are killed when it collides with a U.S. Army Air Force bomber near Palm Springs, California.
- 1942 - World War II: The Battle for Henderson Field begins on Guadalcanal.
- 1944 - World War II: The Battle of Leyte Gulf begins.
- 1945 – Jackie Robinson of the Kansas City Monarchs signs a contract with the Brooklyn Dodger's minor league team, the Montreal Royals, breaking Major League Baseball's color barrier.
- 1955 - Prime Minister Ngô Đình Diệm defeats former emperor Bảo Đại in a referendum and founds the Republic of Vietnam.
- 1955 - The people of the Saar region vote in a referendum to unite with West Germany instead of France.
- 1956 - Secret police shoot several anti-communist protesters, igniting the Hungarian Revolution.
- 1958 - Canada's Springhill mining disaster kills seventy-five miners, while ninety-nine others are rescued.
- 1958 - Belgian artist Peyo's comic characters, the Smurfs, make their debut in Spirou magazine.
- 1959 - Aeroflot Flight 200 crashes while attempting to land at Vnukovo International Airport, killing 28.
- 1965 - Vietnam War: The 1st Cavalry Division, in conjunction with the Army of the Republic of Vietnam, launches an operation seeking to destroy Communist forces during the siege of Plei Me.
- 1970 - Gary Gabelich sets a land speed record in a rocket-powered automobile called the Blue Flame, fueled with natural gas.
- 1972 - Vietnam War: Operation Linebacker, a US bombing campaign against North Vietnam in response to its Easter Offensive, ends after five months.
- 1978 - Aeroflot Flight 6515 crashes off Syvash, killing all 26 people aboard.
- 1982 - A gunfight breaks out between police officers and members of a religious cult in Arizona. The shootout leaves two cultists dead and dozens of cultists and police officers injured.
- 1983 - Lebanese Civil War: The U.S. Marines Corps barracks in Beirut is hit by a truck bomb, killing 241 U.S. military personnel. A French Army barracks in Lebanon is also hit that same morning, killing 58 troops.
- 1989 - The Hungarian Republic officially replaces the communist Hungarian People's Republic.
- 1989 - Bankruptcy of Wärtsilä Marine, the biggest bankruptcy in the Nordic countries up until then.
- 1989 - An explosion at the Houston Chemical Complex in Pasadena, Texas, which registered a 3.5 on the Richter magnitude scale, kills 23 and injures 314.
- 1991 - Signing of the Paris Peace Accords which ends the Cambodian–Vietnamese War.
- 1993 - The Troubles: A Provisional IRA bomb prematurely detonates in Belfast, killing the bomber and nine civilians.
- 1995 - Yolanda Saldívar is found guilty of first-degree murder in the shooting death of popular Latin singer Selena.
- 1998 - Israel and the Palestinian Authority sign the Wye River Memorandum.
- 2001 - Apple Computer releases the iPod.
- 2002 - Second Chechen War: Chechen separatist terrorists seize the House of Culture theater in Moscow and take approximately 700 theater-goers hostage.
- 2004 - A powerful earthquake and its aftershocks hit Niigata Prefecture in northern Japan, killing 35 people, injuring 2,200, and leaving 85,000 homeless or evacuated.
- 2007 - A storm causes the Mexican Kab 101 oil platform to collide with a wellhead, leading to the death and drowning of 22 people during rescue operations after evacuation of the platform.
- 2007 - Space Shuttle Discovery is launched on STS-120, with Pamela Melroy becoming the second female space shuttle commander.
- 2011 - A powerful 7.2 magnitude earthquake strikes Van Province, Turkey, killing 582 people and injuring thousands.
- 2011 - The Libyan National Transitional Council deems the Libyan Civil War over.
- 2015 - The lowest sea-level pressure in the Western Hemisphere, and the highest reliably-measured non-tornadic sustained winds, are recorded in Hurricane Patricia, which strikes Mexico hours later, killing at least 13 and causing over $280 million in damages.
- 2017 - War against the Islamic State: Philippine defense secretary Delfin Lorenzana declares the end of the Siege of Marawi.
- 2020 - Second Libyan Civil War: The Second Libyan Civil War comes to an end as all parties to the 5+5 Joint Libyan Military Commission agree to a ceasefire.
- 2022 - Xi Jinping is elected as General Secretary of the Chinese Communist Party by the Central Committee, beginning a third term of the paramount leader of China.
- 2022 - Myanmar Air Force airstrikes a concert in Hpakant Township, Kachin state killing at least 80 people, including senior Kachin Independence Organisation officials, in the Hpakant massacre.
Births
Pre-1600
- 1006 - Wen Yanbo, Chinese grand chancellor
- 1255 - Ferdinand de la Cerda, Spanish noble
- 1491 - Ignatius of Loyola, Catholic priest
- 1516 - Charlotte of Valois, French princess
1601–1900
- 1634 - Hedwig Eleonora of Holstein-Gottorp, Swedish queen
- 1654 - Johann Bernhard Staudt, Austrian composer
- 1698 - Ange-Jacques Gabriel, French architect, designed the École Militaire
- 1705 - Maximilian Ulysses Browne, Austrian field marshal
- 1713 - Pieter Burman the Younger, Dutch philologist, poet, and educator
- 1762 - Samuel Morey, American engineer
- 1766 - Emmanuel de Grouchy, Marquis de Grouchy, French general
- 1790 - Chauncey Allen Goodrich, American minister, lexicographer, and educator
- 1796 - Stefano Franscini, Swiss statistician and politician
- 1801 - Albert Lortzing, German singer-songwriter and actor
- 1805 - John Russell Bartlett, American linguist and historian
- 1813 - Ludwig Leichhardt, German-Australian explorer
- 1815 - João Maurício Vanderlei, Baron of Cotejipe, Brazilian politician
- 1817 - Pierre Larousse, French lexicographer and author
- 1822 - Gustav Spörer, German astronomer
- 1832 - Johan Gabriel Ståhlberg, Finnish priest and father of K. J. Ståhlberg, the first President of Finland
- 1835 - Adlai Stevenson I, American lawyer and politician, 23rd Vice President of the United States
- 1837 - Moritz Kaposi, Hungarian dermatologist
- 1844 - Robert Bridges, English poet and playwright
- 1857 - Juan Luna, Filipino painter and sculptor
- 1863 - Mirko Breyer, Croatian writer, bibliographer, antiquarian, and one of the notable alleged and false victims of the Stara Gradiška concentration camp
- 1865 - Neltje Blanchan, American historian and author
- 1869 - John Heisman, American football player and coach
- 1870 - Francis Kelley, Canadian-American bishop
- 1873 - William D. Coolidge, American physicist and engineer
- 1874 - Charles Kilpatrick, American runner and educator
- 1875 - Gilbert N. Lewis, American chemist and academic
- 1876 - Franz Schlegelberger, German judge and politician, Reich Ministry of Justice
- 1878 - Jaan Lattik, Estonian pastor and politician, 9th Estonian Minister of Foreign Affairs
- 1880 - Dominikus Böhm, German architect
- 1880 - Una O'Connor, Irish-American actress and singer
- 1883 - Hugo Wast, Argentine writer
- 1885 - Lawren Harris, Canadian painter and educator
- 1888 - Onésime Gagnon, Canadian scholar and politician, 20th Lieutenant Governor of Quebec
- 1892 - Speckled Red, American blues/boogie-woogie piano player and singer-songwriter
- 1894 - Rube Bressler, American baseball player
- 1894 - Emma Vyssotsky, American astronomer and academic
- 1896 - Hilario Abellana, Filipino politician
- 1896 - Lilyan Tashman, American actress
- 1897 - John Baker, English air marshal
- 1897 - Juan Ignacio Luca de Tena, Spanish writer
- 1899 - Bernt Balchen, Norwegian aviator
- 1900 - Douglas Jardine, Indian-English cricketer and lawyer