November 21 events in history

235 Pope Anterus succeeds Pontian as the nineteenth pope. During the persecutions of emperor Maximinus Thrax he is martyred
1009 Lý Công Uẩn is enthroned as emperor of Đại Cồ Việt, founding the Lý dynasty
1386 Timur of Samarkand captures and sacks the Georgian capital of Tbilisi, taking King Bagrat V of Georgia captive
1620 Plymouth Colony settlers sign the Mayflower Compact (November 11, O.S.)
1783 In Paris, Jean-François Pilâtre de Rozier and François Laurent d'Arlandes, make the first untethered hot air balloon flight
1789 North Carolina ratifies the United States Constitution and is admitted as the 12th U.S. state
1861 American Civil War: Confederate President Jefferson Davis appoints Judah Benjamin secretary of war
1877 Thomas Edison announces his invention of the phonograph, a machine that can record and play sound
1894 Port Arthur, Manchuria, falls to the Japanese, a decisive victory of the First Sino-Japanese War, after which Japanese troops are accused of the massacre of the remaining inhabitants of the city. (Reports conflict on this subject.)
1902 The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game
1905 Albert Einstein's paper, "Does the Inertia of a Body Depend Upon Its Energy Content?", is published in the journal Annalen der Physik. This paper reveals the relationship between energy and mass. This leads to the mass–energy equivalence formula E = mc²
1910 Sailors onboard Brazil's most powerful military units, including the brand-new warships Minas Geraes, São Paulo, and Bahia, violently rebel in what is now known as the Revolta da Chibata (Revolt of the Lash)
1916 World War I: A mine explodes and sinks HMHS Britannic in the Aegean Sea, killing 30 people
1918 The Flag of Estonia, previously used by pro-independence activists, is formally adopted as the national flag of the Republic of Estonia
1918 A pogrom takes place in Lwów (now Lviv); over three days, at least 50 Jews and 270 Ukrainian Christians are killed by Poles
1920 Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday". This included fourteen British informants, fourteen Irish civilians and three Irish Republican Army prisoners
1922 Rebecca Latimer Felton of Georgia takes the oath of office, becoming the first female United States Senator
1927 Columbine Mine massacre: Striking coal miners are allegedly attacked with machine guns by a detachment of state police dressed in civilian clothes
1942 The completion of the Alaska Highway (also known as the Alcan Highway) is celebrated (however, the highway is not usable by general vehicles until 1943)
1945 The United Auto Workers strike 92 General Motors plants in 50 cities to back up worker demands for a 30-percent raise
1950 Two Canadian National Railway trains collide in northeastern British Columbia in the Canoe River train crash; the death toll is 21, with 17 of them Canadian troops bound for Korea
1953 The British Natural History Museum announces that the "Piltdown Man" skull, initially believed to be one of the most important fossilized hominid skulls ever found, is a hoax
1959 American disc jockey Alan Freed, who had popularized the term "rock and roll" and music of that style, is fired from WABC-AM radio for refusing to deny allegations that he had participated in the payola scandal
1962 The Chinese People's Liberation Army declares a unilateral ceasefire in the Sino-Indian War
1964 The Verrazano–Narrows Bridge opens to traffic. (At the time it is the world's longest suspension bridge.)
1964 Second Vatican Council: The third session of the Roman Catholic Church's ecumenical council closes
1967 Vietnam War: American General William Westmoreland tells news reporters: "I am absolutely certain that whereas in 1965 the enemy was winning, today he is certainly losing."
1969 U.S. President Richard Nixon and Japanese Premier Eisaku Satō agree in Washington, D.C., on the return of Okinawa to Japanese control in 1972. Under the terms of the agreement, the U.S. is to retain its rights to bases on the island, but these are to be nuclear-free
1969 The first permanent ARPANET link is established between UCLA and SRI
1970 Vietnam War: Operation Ivory Coast: A joint United States Air Force and Army team raids the Sơn Tây prisoner-of-war camp in an attempt to free American prisoners of war thought to be held there
1971 Indian troops, partly aided by Mukti Bahini (Bengali guerrillas), defeat the Pakistan army in the Battle of Garibpur
1972 Voters in South Korea overwhelmingly approve a new constitution, giving legitimacy to Park Chung-hee and the Fourth Republic
1974 The Birmingham pub bombings kill 21 people. The Birmingham Six are sentenced to life in prison for the crime but subsequently acquitted
1977 Minister of Internal Affairs Allan Highet announces that the national anthems of New Zealand shall be the traditional anthem "God Save the Queen" and "God Defend New Zealand", by Thomas Bracken (lyrics) and John Joseph Woods (music), both being of equal status as appropriate to the occasion
1979 The United States Embassy in Islamabad, Pakistan, is attacked by a mob and set on fire, killing four
1980 A deadly fire breaks out at the MGM Grand Hotel in Paradise, Nevada (now Bally's Las Vegas). Eighty-seven people are killed and more than 650 are injured in the worst disaster in Nevada history
1985 United States Navy intelligence analyst Jonathan Pollard is arrested for spying after being caught giving Israel classified information on Arab nations. He is subsequently sentenced to life in prison
1986 Iran–Contra affair: National Security Council member Oliver North and his secretary start to shred documents allegedly implicating them in the sale of weapons to Iran and channeling the proceeds to help fund the Contra rebels in Nicaragua
1992 A major tornado strikes the Houston, Texas area during the afternoon. Over the next two days the largest tornado outbreak ever to occur in the US during November spawns over 100 tornadoes before ending on the 23rd
1995 The Dayton Peace Agreement is initialed at the Wright-Patterson Air Force Base, near Dayton, Ohio, ending three and a half years of war in Bosnia and Herzegovina. The agreement is formally ratified in Paris, on December 14 that same year
1996 Humberto Vidal explosion: Thirty-three people die when a Humberto Vidal shoe shop explodes
2002 NATO invites Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia to become members
2004 The second round of the Ukrainian presidential election is held, giving rise to massive protests and controversy over the election's integrity
2004 The island of Dominica is hit by the most destructive earthquake in its history. The northern half of the island sustains the most damage, especially the town of Portsmouth. It is also felt in neighboring Guadeloupe, where one person is killed
2004 The Paris Club agrees to write off 80% (up to $100 billion) of Iraq's external debt
2006 Anti-Syrian Lebanese Minister and MP Pierre Gemayel is assassinated in suburban Beirut
2009 A mine explosion in Heilongjiang province, northeastern China, kills 108
2012 At least 28 are wounded after a bomb is thrown onto a bus in Tel Aviv
2013 A supermarket roof collapse in Riga, Zolitude, Latvia killing 54 people