1111 Highest Galician nobility led by Pedro Fróilaz de Traba and the bishop Diego Gelmírez crowned Alfonso VII as “King of Galicia“.
1176 The Battle of Myriokephalon.
1462 The Battle of Świecino (also known as the Battle of Żarnowiec) during Thirteen Years’ War.
1577 The Peace of Bergerac was signed between Henry III of France and the Huguenots.
1631 Sweden won a major victory at the Battle of Breitenfeld against the Holy Roman Empire during the Thirty Years War.
1683 Antonie van Leeuwenhoek wrote to the Royal Society describing “animalcules“: the first known description of protozoa.
1778 The Treaty of Fort Pitt was signed, the first formal treaty between the United States and a Native American tribe (the Lenape or Delaware Indians).
1787 The United States Constitution was signed in Philadelphia.
1809 Peace between Sweden and Russia in the Finnish War, the territory which became Finland was ceded to Russia by the Treaty of Fredrikshamn.
1859 Joshua A. Norton declared himself “Emperor Norton I” of the United States.
1862 American Civil War: George B. McClellan halted the northward drive of Robert E. Lee’s Confederate army in the single-day Battle of Antietam, the bloodiest day in American history.
1862 American Civil War: The Allegheny Arsenal explosion resulted in the single largest civilian disaster during the war.
1883 William Carlos Williams, American writer, was born (d. 1963).
1894 The Battle of Yalu River, the largest naval engagement of the First Sino-Japanese War.
1900 Philippine-American War: Filipinos under Juan Cailles defeated Americans under Colonel Benjamin F. Cheatham at Mabitac.
1908 The Wright Flyer flown by Orville Wright, with Lieutenant Thomas Selfridge as passenger, crashed killing Selfridge who became the first airoplane fatality.
1914 Andrew Fisher became Prime Minister of Australia for the third time.
1916 Mary Stewart, English novelist, was born (d. 2014).
1916 World War I: Manfred von Richthofen (“The Red Baron”), a flying ace of the German Luftstreitkräfte, won his first aerial combat near Cambrai, France.
1923 Hank Williams, American musician, was born (d. 1953).
1924 The Border Defence Corps was established in the Second Polish Republic for the defence of the eastern border against armed Soviet raids and local bandits.
1928 The Okeechobee Hurricane struck southeastern Florida, killing upwards of 2,500 people.
1929 Sir Stirling Moss, English race car driver, was born.
1931 Anne Bancroft, American actress, was born (d. 2005).
1939 World War II: A German U-boat U 29 sank the British aircraft carrierHMS Courageous.
1939 Taisto Mäki became the first man to run the 10,000 metres in under 30 minutes, in a time of 29:52.6.
1941 As well as (temporarily) doing away with capital punishment for murder, the Crimes Amendment Act 1941 abolished judicial provision for flogging and whipping.
1941 World War II: A decree of the Soviet State Committee of Defense, restoring Vsevobuch in the face of the Great Patriotic War, was issued
1944 World War II: Allied Airborne troops parachuted into the Netherlands as the “Market” half of Operation Market Garden.
1945 Bruce Spence, New Zealand actor, was born.
1948 The Lehi (also known as the Stern gang) assassinated Count Folke Bernadotte, who was appointed by the UN to mediate between the Arab nations and Israel.
1949 The Canadian steamship SS Noronic burned in Toronto Harbour with the loss of over 118 lives.
1956 Television was first broadcast in Australia.
1976 The first Space Shuttle, Enterprise, was unveiled by NASA.
1978 The Camp David Accords were signed by Israel and Egypt.
1980 After weeks of strikes at the Lenin Shipyard in Gdańsk, Poland, the nationwide independent trade union Solidarity was established.
1980 Former Nicaraguan President Anastasio Somoza Debayle was killed.
1983 Vanessa Williams became the first black Miss America.
1991 – The first version of the Linux kernel (0.01) was released to the Internet.
1992 An Iranian Kurdish leader and his two joiners were assassinated by political militants in Berlin.
1993 Last Russian troops left Poland.
2001 The New York Stock Exchange reopened for trading after the September 11 Attacks, the longest closure since the Great Depression.
2004 Tamil was declared the first classical language in India.
2006 Fourpeaked Mountain in Alaska erupted, marking the first eruption for the long-dormant volcano in at least 10,000 years.
2007 AOL, once the largest ISP in the U.S., officially announced plans to refocus the company as an advertising business and to relocate its corporate headquarters from Dulles, Virginia to New York.
2011 – Occupy Wall Street movement begins in Zucotti Park, New York City.
2016 – Two bombs exploded in Seaside Park, New Jersey, and Manhattan, New York. 31 people were injured in the Manhattan bombing.
Sourced from NZ History Online & Wikipedia