On September 18:
96 Nerva was proclaimed Roman Emperor after Domitian was assassinated.
324 Constantine the Great decisively defeated Licinius in the Battle of Chrysopolis, establishing Constantine’s sole control over the Roman Empire.
1180 Philip Augustus became king of France.
1454 In the Battle of Chojnice, the Polish army was defeated by the Teutonic army during the Thirteen Years’ War.
1709 Samuel Johnson, English writer and lexicographer, was born (d. 1784).
1739 The Treaty of Belgrade was signed, ceding Belgrade to the Ottoman Empire.
1793 The first cornerstone of the Capitol building was laid by George Washington.
1809 The Royal Opera House in London opened.
1810 First Government Junta in Chile.
1812 The 1812 Fire of Moscow died down after destroying more than three quarters of the city. Napoleon returned from the Petrovsky Palace to the Moscow Kremlin, which was spared from the fire.
1837 Tiffany and Co. (first named Tiffany & Young) was founded by Charles Lewis Tiffany and Teddy Young in New York City.
1838 The Anti-Corn Law League was established by Richard Cobden.
1850 The U.S. Congress passed the Fugitive Slave Law of 1850.
1851 First publication of The New-York Daily Times, which later became The New York Times.
1863 American Civil War: Battle of Chickamauga.
1870 Old Faithful Geyser was observed and named by Henry D. Washburn during the Washburn-Langford-Doane Expedition to Yellowstone.
1872 King Oscar II acceded to the throne of Sweden-Norway.
1873 The Panic of 1873 began.
1876 James Scullin, 9th Prime Minister of Australia, was born (d. 1953).
1879 The Blackpool Illuminations were switched on for the first time.
1882 The Pacific Stock Exchange opened.
1885 Riots broke out in Montreal to protest against compulsory smallpox vaccination.
1889 Doris Blackburn, Australian politician, was born (d. 1970).
1895 Booker T. Washington delivered the “Atlanta Compromise” address.
1895 Daniel David Palmer gave the first chiropractic adjustment.
1895 John Diefenbaker, 13th Prime Minister of Canada, was born (d. 1979).
1898 Fashoda Incident – Lord Kitchener’s ships reached Fashoda, Sudan.
1900 Seewoosagur Ramgoolam, 1st Prime Minister of Mauritius, was born (d. 1985).
1905 Agnes de Mille, American choreographer, was born (d. 1993).
1905 Greta Garbo, Swedish actress, was born(d. 1990) .
1906 A typhoon with tsunami killed an estimated 10,000 people in Hong Kong.
1910 In Amsterdam, 25,000 demonstrated for general suffrage.
1911 Russian Premier Peter Stolypin was shot at the Kiev Opera House.
1914 The Irish Home Rule Act became law, but was delayed until after World War I.
1919 The Netherlands gave women the right to vote.
1919 – Fritz Pollard became the first African-American to play professional football for a major team, the Akron Pros.
1923 Queen Anne of Romania was born.
1928 Juan de la Cierva made the first autogyro crossing of the English Channel.
1931 The Mukden Incident gave Japan the pretext to invade and occupy Manchuria.
1937 David and Mary McGregor moved in to New Zealand’s first state house.
1939 Jorge Sampaio, President of Portugal, was born.
1939 World War II: Polish government of Ignacy Mościcki fled to Romania.
1939 William Joyce made his first Nazi propaganda broadcast.
1940 World War II: Italian troops conquered Sidi Barrani.
1942 The Canadian Broadcasting Corporation was authorized.
1943 World War II: The Jews of Minsk were massacred at Sobibór.
1943 – World War II: Adolf Hitler ordered the deportation of Danish Jews.
1944 World War II: The British submarine HMS Tradewind torpedoed Junyō Maru, 5,600 killed.
1948 Communist Madiun uprising in Dutch Indies.
1948 –Margaret Chase Smith of Maine became the first woman elected to the US Senate without completing another senator’s term, when she defeated Democratic opponent Adrian Scolten.
1948 – The Donald Bradman-led Australian cricket team completed the unprecedented feat of going through an English summer without defeat.
1952 Dee Dee Ramone, American bassist (The Ramones), was born (d. 2002).
1959 Vanguard 3 was launched into Earth orbit.
1961 U.N. Secretary-General Dag Hammarskjöld died in a plane crash while attempting to negotiate peace in the war-torn Katanga region of the Democratic Republic of the Congo.
1964 Constantine II of Greece married Danish princess Anne-Marie.
1971 Lance Armstrong, American cyclist, was born.
1972 First Ugandans expelled by Idi Amin arrived in the United Kingdom.
1974 Hurricane Fifi struck Honduras with 110 mph winds, killing 5,000 people.
1975 Patty Hearst was arrested after a year on the FBI Most Wanted List.
1976 Mao Zedong‘s funeral in Beijing.
1980 Soyuz 38 carried 2 cosmonauts (including 1 Cuban) to Salyut 6 space station.
1981 Assemblée Nationale voted to abolish capital punishment in France.
1982 Christian militia began killing six-hundred Palestinians in Lebanon.
1984 Joe Kittinger completed the first solo balloon crossing of the Atlantic.
1988 End of pro-democracy uprisings in Myanmar after a bloody military coup by the State Law and Order Restoration Council.
1991 Yugoslavia began a naval blockade of 7 Adriatic port cities.
1992 An explosion rocks Giant Mine at the height of a labour dispute, killing 9 replacement workers.
1997 United States media magnate Ted Turner donated $US1 billion to the United Nations.
1997 – Voters in Wales voted yes (50.3%) on a referendum on Welsh autonomy.
1998 ICANN was formed.
2001 First mailing of anthrax letters from Trenton, New Jersey in the 2001 anthrax attacks.
2006 Right wing protesters riot the building of the Hungarian Television in Budapest.
2007 Pervez Musharraf announced he would step down as army chief and restore civilian rule to Pakistan, but only after he was re-elected president.
2007 Buddhist monks joined anti-government protesters in Myanmar, starting the Saffron Revolution.
2009 The 72 year run of the soap opera The Guiding Light ended as its final episode is broadcast.
Sourced from NZ History Online & Wikipedia