September 18 is the 261st day of the year (262nd in leap years). There are 104 days remaining.
96 - Nerva elevated as Roman Emperor
323 - Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire.
1454 - In battle of Chojnice, Polish army is defeated by Teutonic army during the Thirteen Years' War
1739 - Treaty of Belgrade signed, ceding Belgrade to the Ottoman Empire
1759 - British capture Quebec City
1810 - First Government Junta in Chile. Though supposed to rule only in the absence of the king, it was in fact the first step towards independence from Spain, and it is commemorated as such.
1850 - United States Congress passes Fugitive Slave Act
1851 - New York Times begins publishing
1873 - The Panic of 1873 begins
1895 - Daniel David Palmer makes the first chiropractic adjustment
1906 - Typhoon with tsunami killed an estimated 10.000 persons in Hong Kong
1914 - The Battle of Aisne ends
1927 - Columbia Broadcasting System goes on the air
1931 - Mukden Incident. After that, Japan occupied Manchuria.
1942 - Canadian Broadcasting Corporation authorized
1943 - The Jews of Minsk are massacred at Sobibor
1947 - The United States Department of Defense begins operation (formerly known as National Military Establishment).
1975 - Patty Hearst arrested after a year on the FBI Most Wanted List
1985 - Steve Jobs resigns from Apple Computer
1989 - Hurricane Hugo hits Puerto Rico, killing six
1997 - Ted Turner donates $1 billion to the United Nations
1998 - ICANN is formed
2003 - Hurricane Isabel makes landfall in the U.S.
53 - Trajan, Roman emperor
1709 - Samuel Johnson, essayist, critic, poet
1819 - Leon Foucault, physicist († 1868)
1895 - John Diefenbaker, thirteenth Prime Minister of Canada († 1979)
1905 - Greta Garbo, actress († 1990)
1905 - Agnes de Mille, dancer, choreographer († 1993)
1905 - Eddie 'Rochester' Anderson, actor († 1977)
1907 - Leon Askin, actor
1908 - Satchel Paige, Baseball Hall of Famer († 1965)
1916 - Rossano Brazzi, actor († 1994)
1917 - June Foray, voice over actress
1920 - Jack Warden, actor
1923 - Peter Smithson, architect († 2003)
1926 - Bud Greenspan, documentary film producer, director
1932 - Nikolai Rukavishnikov, cosmonaut
1933 - Jimmie Rodgers, country music singer, composer
1938 - Robert Blake, actor
1940 - Frankie Avalon, musician
1950 - Anna Deavere Smith, conceptual artist
1952 - Dee Dee Ramone, musician († 2002)
1952 - Rick Pitino, basketball coach
1959 - Ryne Sandberg, baseball star
1961 - James Gandolfini, actor
1964 - Holly Robinson, actress
1971 - Jada Pinkett Smith, model, actress
1971 - Lance Armstrong, cycling champion
1974 - Ticha Penicheiro, WNBA basketball player
96 - Roman emperor Domitian (assassinated)
1860 - Joseph Locke, railway builder and civil engineer
1961 - Dag Hammarskjold, Secretary General of the United Nations
1964 - Sean O'Casey, playwright
1968 - Franchot Tone, actor
1970 - Jimi Hendrix, rock musician
1980 - Katherine Anne Porter, novelist
1994 - Vitas Gerulaitis, tennis player
2003 - Emil Fackenheim, Holocaust survivor, philosopher
In ancient Greece, the fifth day of the Eleusinian mysteries.
Chile: Independence Day (see Events)
In the French Revolutionary Calendar, the "Feast of Genius"
September 17 · September 19 · August 18 · October 18 · more historical anniversaries
See Also: January, February, March, April, May, June, July, August, September, October, November, December - more historical anniversaries