Wikipedia:Selected anniversaries/November 27

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 * 1095 – At the Council of Clermont, Pope Urban II called for the First Crusade, declaring holy war against the Muslims who had occupied the Holy Land and were attacking the Eastern Roman Empire.
 * 1161 – A Song dynasty fleet defeated Jin ships in a naval engagement on the Yangtze river during the Jin–Song Wars.
 * 1703 – The great storm of 1703, one of the most severe storms to strike southern Great Britain, destroyed the first Eddystone Lighthouse off Plymouth.
 * 1895 – Swedish chemist and industrialist Alfred Nobel (pictured) signed his last will and testament, setting aside the bulk of his estate to establish the Nobel Prize after his death.
 * 1943 – World War II: Australian forces began the Battle of Wareo by conducting clearing operations between Bonga and North Hill.
 * 1944 – Between 3,500 and 4,000 tonnes of ordnance exploded at the RAF Fauld underground munitions storage depot in the largest non-nuclear explosion in the United Kingdom.
 * 1945 – A consortium of twenty-two U.S. charities founded CARE with the mission of delivering food aid to Europe in the aftermath of World War II.
 * 1989 – A bomb placed by the Medellín Cartel in an attempt to kill Colombian presidential candidate César Gaviria destroyed Avianca Flight 203, killing 110 people, but Gaviria was not on the flight.
 * 1991 – Operations at the Reagan Test Site were disrupted due to the nearby formation of Tropical Storm Zelda.
 * 1999 – The Labour Party defeated the governing National Party in the New Zealand general election, with Labour's Helen Clark becoming the country's first female prime minister to have won office at an election.
 * 2001 – Astronomers announced the detection of sodium in the atmosphere of the extrasolar planet HD 209458 b (artist's impression pictured), the first exoplanet atmosphere to be measured.
 * 2009 – A bomb exploded under, and derailed, a Russian high-speed train travelling between Moscow and Saint Petersburg, killing 28 passengers.
 * 2020 – Nuclear physicist Mohsen Fakhrizadeh, regarded as the chief of Iran's nuclear program, was assassinated, allegedly by Mossad.
 * Born/died: | Françoise d'Aubigné, Marquise de Maintenon |b|1635| Increase Sumner |b|1746| Georg Forster |b|1754| Rachel Brooks Gleason |b|1820| Ada Lovelace |d|1852| William Bliss Baker |b|1859| Charles A. Beard |b|1874| Arthur Sullivan |b|1896| Jean Albert Gaudry |d|1908| Glynn Lunney |b|1936| May Gibbs |d|1969| Gary Speed |d|2011 Phillip Hughes |d|2014

November 27: Guru Nanak Gurpurab (Sikhism, 2023)


 * 1835 – James Pratt and John Smith became the last people to be executed in England for sodomy.
 * 1856 – William III (pictured) unilaterally revised the constitution of Luxembourg, greatly expanding his powers as grand duke.
 * 1950 – Korean War: The Chinese People's Volunteer Army launched multiple attacks against United Nations forces, beginning the Battle of Chosin Reservoir.
 * 1963 – President Lyndon B. Johnson delivered the "Let Us Continue" speech to a joint session of the U.S. Congress five days after the assassination of John F. Kennedy, in which he advocated for civil-rights legislation and national cohesion.
 * 2009 – Lady Gaga performed the first concert of The Monster Ball Tour, which became the highest-grossing tour in history for a debut headlining artist.