Editing October 27 (section)

===1901–present===
*[[1907]] &ndash; Fifteen people are [[Černová massacre|killed in Hungary]] when gendarmes opened fire on a crowd gathered at a church consecration.
*[[1914]] &ndash; [[World War I]]: The new British battleship [[HMS Audacious (1912)|HMS ''Audacious'']] is sunk by a minefield laid by the armed German merchant-cruiser ''Berlin''.
*[[1916]] &ndash; Negus Mikael, marching on the Ethiopian capital in support of his son Emperor Iyasu V, [[Battle of Segale|is defeated]] by Fitawrari abte Giyorgis, securing the throne for Empress Zewditu I.
*[[1919]] &ndash; The [[Regional Congress of Peasants, Workers and Insurgents#Fourth Congress (October 1919)|Fourth Regional Congress of Peasants, Workers and Insurgents]] is held by the [[Makhnovshchina]] at [[Zaporizhzhia|Oleksandrivsk]].<ref>{{cite book|first=Michael|last=Malet|url=https://libcom.org/library/nestro-makhno-russian-civil-war|title=Nestor Makhno in the Russian Civil War|year=1982|isbn=0-333-25969-6|oclc=1194667963|publisher=[[Palgrave Macmillan]]|location=[[London]]|pages=108–109}}</ref>
*[[1922]] &ndash; A [[Southern Rhodesian government referendum, 1922|referendum]] in Rhodesia rejects the country's annexation to the South African Union.
*[[1924]] &ndash; The [[Uzbek Soviet Socialist Republic|Uzbek SSR]] is founded in the Soviet Union.
*[[1930]] &ndash; Ratifications exchanged in London for the first [[London Naval Treaty]] go into effect immediately, further limiting the expensive naval arms race among its five signatories.
*[[1936]] &ndash; Mrs. Wallis Simpson obtains her divorce, which would eventually allow her to marry [[King Edward VIII]] of the United Kingdom, thus forcing his [[Edward VIII abdication crisis|abdication]] from the throne.<ref>{{cite news|title=Divorce Decree for Mrs. Simpson|work=Liverpool Evening Express|date=27 October 1936|page=1}}</ref>
*[[1944]] &ndash; [[World War II]]: [[Wehrmacht|German forces]] capture [[Banská Bystrica]] during [[Slovak National Uprising]] thus bringing it to an end.
*[[1948]] &ndash; [[1948 Donora smog|Ecological disaster]] in [[Donora, Pennsylvania]].<ref>{{cite news|author=Hamill, Sean D. |url=https://www.nytimes.com/2008/11/02/us/02smog.html |title=Unveiling a Museum, a Pennsylvania Town Remembers the Smog That Killed 20|newspaper=[[The New York Times]]|date= November 1, 2008|access-date= November 2, 2008}}</ref>
*[[1954]] &ndash; [[Benjamin O. Davis, Jr.]] becomes the first [[African-American]] general in the [[United States Air Force]].
*[[1958]] &ndash; Iskander Mirza, the first President of Pakistan, is [[1958 Pakistani coup d'état|deposed]] by General Ayub Khan, who had been appointed the enforcer of martial law by Mirza 20 days earlier.
*[[1961]] &ndash; NASA tests the first Saturn I rocket in [[SA-1 (Apollo)|Mission Saturn-Apollo 1]].
*[[1962]] &ndash; Major [[Rudolf Anderson]] of the United States Air Force becomes the only direct human casualty of the [[Cuban Missile Crisis]] when his U-2 reconnaissance airplane is shot down over Cuba by a Soviet-supplied surface-to-air missile.
*  1962   &ndash; By refusing to agree to the firing of a nuclear torpedo at a US warship, [[Vasily Arkhipov (vice admiral)|Vasily Arkhipov]] averts nuclear war.
*[[1964]] &ndash; [[Ronald Reagan]] delivers a speech on behalf of the Republican candidate for president, Barry Goldwater. The speech launches his political career and comes to be known as "[[A Time for Choosing]]".
*[[1971]] &ndash; The [[Democratic Republic of the Congo]] is renamed [[Zaire]].
*[[1979]] &ndash; [[Saint Vincent and the Grenadines]] gains its independence from the United Kingdom.
*[[1981]] &ndash; Cold War: The {{ship|Soviet submarine|S-363}} runs aground on the east coast of Sweden.
*[[1986]] &ndash; The British government suddenly deregulates financial markets, leading to a total restructuring of the way in which they operate in the country, in an event now referred to as the [[Big Bang (financial markets)|Big Bang]].
*[[1988]] &ndash; Cold War: Ronald Reagan suspends construction of the new [[Embassy of the United States, Moscow|U.S. Embassy in Moscow]] due to Soviet listening devices in the building structure.
*[[1991]] &ndash; [[Turkmenistan]] achieves independence from the Soviet Union.
*[[1992]] &ndash; United States Navy radioman [[Allen R. Schindler, Jr.]] is murdered by shipmate Terry M. Helvey for being gay, precipitating debate about gays in the military that results in the United States' "[[Don't ask, don't tell]]" military policy.
*[[1993]] &ndash; [[Widerøe Flight 744]] crashes in [[Overhalla Municipality]], Norway, killing six people.<ref>{{cite web |author= |author-link= |year=1996 |title=Rapport om luftfartsulykke ved Namsos den 27. oktober 1993 med DHC-6-300 Twin Otter, LN-BNM |trans-title=Aviation accident report at Namsos on October 27, 1993 involving DHC-6-300 Twin Otter, LN-BNM |url=http://www.aibn.no/rapport-07-1996-pdf?pid=Native-ContentFile-File&attach=1 |publisher=[[Norwegian Safety Investigation Authority|Accident Investigation Board Norway]] |language=Norwegian}}</ref>
*[[1994]] &ndash; [[Gliese 229B]] is the first Substellar Mass Object to be unquestionably identified.
*[[1997]] &ndash; The [[1997 Asian financial crisis]] causes a [[October 27, 1997, mini-crash|crash]] in the Dow Jones Industrial Average.
*[[1999]] &ndash; Gunmen [[Armenian parliament shooting|open fire]] in the Armenian Parliament, killing the Prime Minister and seven others.
*[[2014]] &ndash; Britain withdraws from Afghanistan at the end of [[Operation Herrick]], after 12 years four months and seven days.
*[[2017]] &ndash; [[Catalonia]] [[Catalan declaration of independence|declares independence]] from [[Spain]]. <!--PLEASE DO NOT REMOVE THIS LISTING without discussing first. Catalonia is fast becoming an extremely contentious topic on Wikipedia and there's a discussion to be had about whether or not this is worthy of inclusion here.-->
*[[2018]] &ndash; A gunman opens fire on a [[Pittsburgh synagogue shooting|Pittsburgh synagogue]] killing eleven and injuring six, including four police officers.
*  2018   &ndash; [[Leicester City F.C.]] owner [[Vichai Srivaddhanaprabha]] [[2018 Leicester helicopter crash|dies in a helicopter crash]] along with four others after a [[Premier League]] match against [[West Ham United F.C.|West Ham United]] at the [[King Power Stadium]] in Leicester, England.<ref>{{cite web|title=Leicester City owner confirmed dead in helicopter crash|url=https://news.sky.com/story/live-leicester-city-owner-confirmed-dead-in-helicopter-crash-11538203}}</ref>
*[[2019]] &ndash; [[Islamic State of Iraq and the Levant]] founder and leader [[Abu Bakr al-Baghdadi]] kills himself and three children by detonating a suicide vest during the U.S. military [[Barisha raid]] in northwestern [[Syria]].<ref name=bbc>{{cite web|website=BBC World News|title=Abu Bakr al-Baghdadi: IS leader 'killed after US operation' in Syria|date=Oct 27, 2019|url=https://www.bbc.com/news/world-us-canada-50200339}}</ref><ref name=cnn>{{cite web|website=CNN Politics|title=President Trump: ISIS leader Abu Bakr al-Baghdadi is dead|author1=Maegan Vazquez|author2=Zachary Cohen |date=Oct 27, 2019|url=https://edition.cnn.com/2019/10/27/politics/isis-abu-bakr-al-baghdadi-operation-donald-trump/index.html}}</ref>