- AD 70 – Siege of Jerusalem: Titus and his Roman legions breach the Second Wall of Jerusalem. Jewish defenders retreat to the First Wall. The Romans build a circumvallation, cutting down all trees within fifteen kilometres.
- 1381 – Beginning of the Peasants’ Revolt in England.
- 1416 – The Council of Constance, called by Emperor Sigismund, a supporter of Antipope John XXIII, burns Jerome of Prague following a trial for heresy.
- 1431 – Hundred Years’ War: In Rouen, France, the 19-year-old Joan of Arc is burned at the stake by an English-dominated tribunal. The Roman Catholic Church remembers this day as the celebration of Saint Joan of Arc.
- 1434 – Hussite Wars: Battle of Lipany: Effectively ending the war, Utraquist forces led by Diviš Bořek of Miletínek defeat and almost annihilate Taborite forces led by Prokop the Great.
- 1510 – During the reign of the Zhengde Emperor, Ming dynasty rebel leader Zhu Zhifan is defeated by commander Qiu Yue, ending the Prince of Anhua rebellion.
- 1536 – King Henry VIII of England marries Jane Seymour, a lady-in-waiting to his first two wives.
- 1539 – In Florida, Hernando de Soto lands at Tampa Bay with 600 soldiers with the goal of finding gold.
- 1574 – Henry III becomes King of France.[1]
- 1588 – The last ship of the Spanish Armada sets sail from Lisbon heading for the English Channel.
- 1631 – Publication of Gazette de France, the first French newspaper.
- 1635 – Thirty Years’ War: The Peace of Prague is signed.
- 1642 – From this date all honors granted by Charles I of England are retroactively annulled by Parliament.
- 1806 – Future U.S. President Andrew Jackson kills Charles Dickinson in a duel.
- 1814 – The First Treaty of Paris is signed, returning the French frontiers to their 1792 extent, and restoring the House of Bourbon to power.
- 1815 – The East Indiaman Arniston is wrecked during a storm at Waenhuiskrans, near Cape Agulhas, in present-day South Africa, with the loss of 372 lives.
- 1834 – Minister of Justice Joaquim António de Aguiar issues a law seizing “all convents, monasteries, colleges, hospices and any other houses” from the Catholic religious orders in Portugal, earning him the nickname of “The Friar-Killer”.
- 1842 – John Francis attempts to murder Queen Victoria as she drives down Constitution Hill in London with Prince Albert.
- 1845 – The Fatel Razack coming from India, lands in the Gulf of Paria in Trinidad and Tobago carrying the first Indians to the country.
- 1854 – The Kansas–Nebraska Act becomes law establishing the US territories of Kansas and Nebraska.
- 1868 – Decoration Day (the predecessor of the modern “Memorial Day“) is observed in the United States for the first time (by “Commander-in-chief of the Grand Army of the Republic” John A. Logan‘s proclamation on May 5).
- 1876 – Ottoman sultan Abdülaziz is deposed and succeeded by his nephew Murad V.
- 1883 – In New York City, a stampede on the recently opened Brooklyn Bridge killed twelve people.
- 1899 – Pearl Hart, a female outlaw of the Old West, robs a stage coach 30 miles southeast of Globe, Arizona.
- 1911 – At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
- 1913 – The Treaty of London is signed, ending the First Balkan War; Albania becomes an independent nation.
- 1914 – The new, and then the largest, Cunard ocean liner RMS Aquitania, 45,647 tons, sets sails on her maiden voyage from Liverpool, England, to New York City.
- 1922 – The Lincoln Memorial is dedicated in Washington, D.C..
- 1925 – May Thirtieth Movement: Shanghai Municipal Police Force shoot and kill 13 protesting workers.
- 1937 – Memorial Day massacre: Chicago police shoot and kill ten labor demonstrators.
- 1941 – World War II: Manolis Glezos and Apostolos Santas climb the Athenian Acropolis and tear down the German flag.
- 1942 – World War II: One thousand British bombers launch a 90-minute attack on Cologne, Germany.
- 1943 – The Holocaust: Josef Mengele becomes chief medical officer of the Zigeunerfamilienlager (Romani family camp) at Auschwitz concentration camp.
- 1948 – A dike along the flooding Columbia River breaks, obliterating Vanport, Oregon within minutes. Fifteen people die and tens of thousands are left homeless.
- 1958 – Memorial Day: The remains of two unidentified American servicemen, killed in action during World War II and the Korean War respectively, are buried at the Tomb of the Unknown Soldier in Arlington National Cemetery.
- 1959 – The Auckland Harbour Bridge, crossing the Waitematā Harbour in Auckland, New Zealand, is officially opened by Governor-General Charles Lyttelton, 10th Viscount Cobham.
- 1961 – The long-time Dominican dictator Rafael Trujillo is assassinated in Santo Domingo, Dominican Republic.
- 1963 – A protest against pro-Catholic discrimination during the Buddhist crisis is held outside South Vietnam‘s National Assembly, the first open demonstration during the eight-year rule of Ngo Dinh Diem.
- 1966 – Former Congolese Prime Minister, Évariste Kimba, and several other politicians are publicly executed in Kinshasa on the orders of President Joseph Mobutu.
- 1967 – The Nigerian Eastern Region declares independence as the Republic of Biafra, sparking a civil war.
- 1968 – Charles de Gaulle reappears publicly after his flight to Baden-Baden, Germany, and dissolves the French National Assembly by a radio appeal. Immediately after, less than one million of his supporters march on the Champs-Élysées in Paris. This is the turning point of May 1968 events in France.
- 1971 – Mariner program: Mariner 9 is launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars.
- 1972 – The Angry Brigade goes on trial over a series of 25 bombings throughout the United Kingdom.
- 1972 – In Ben Gurion Airport (at the time: Lod Airport), Israel, members of the Japanese Red Army carry out the Lod Airport massacre, killing 24 people and injuring 78 others.
- 1974 – The Airbus A300 passenger aircraft first enters service.
- 1979 – Downeast Flight 46 crashes on approach to Knox County Regional Airport in Rockland, Maine, killing 17.[2]
- 1975 – European Space Agency is established.[3]
- 1982 – Cold War: Spain joins NATO.
- 1990 – Croatian Parliament is constituted after the first free, multi-party elections, today celebrated as the National Day of Croatia.
- 1989 – Tiananmen Square protests of 1989: The 10-metre high “Goddess of Democracy” statue is unveiled in Tiananmen Square by student demonstrators.
- 1998 – The 6.5 Mw Afghanistan earthquake shook the Takhar Province of northern Afghanistan with a maximum Mercalli intensity of VII (Very strong), killing around 4,000–4,500.
- 1998 – Nuclear Testing: Pakistan conducts an underground test in the Kharan Desert. It is reported to be a plutonium device with yield of 20kt TNT equivalent.
- 2003 – Depayin massacre: At least 70 people associated with the National League for Democracy are killed by government-sponsored mob in Burma. Aung San Suu Kyi flees the scene, but is arrested soon afterwards.
- 2008 – Convention on Cluster Munitions is adopted.
- 2008 – TACA Flight 390 overshoots the runway at Toncontín International Airport, killing five people.[4]
- 2012 – Former Liberian president Charles Taylor is sentenced to 50 years in prison for his role in atrocities committed during the Sierra Leone Civil War.
- 2013 – Nigeria passes a law banning same-sex marriage.
-Source: wikipedia