May 31 in History

The Battle of Diamond Rock took place between 31 May and 2 June 1805 during the War of the Third Coalition, when a Franco-Spanish force dispatched under Captain Julien Cosmao was able to retake Diamond Rock, on the approach to Fort-de-France, from the British forces that had occupied it over a year before.

The Guarded Domains of Iran, commonly known as Qajar Iran, was the Iranian state under the rule of the Qajar dynasty, which lasted from 1789 to 1925. It was founded by Agha Mohammad Khan, a chieftain of the Qajar tribe, a Turkic tribe based in northern Iran. In the power struggle following the death of Karim Khan Zand in 1779, Agha Mohammad defeated all competitors from the preceding Zand and Afsharid dynasties, unifying Iran. He re-asserted Iranian sovereignty over large parts of the Caucasus and was formally crowned as Shah in 1796. Although he was murdered the next year, he was succeeded by his nephew Fath-Ali Shah, and the Qajars maintained control over the country until their deposal in 1925.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union to preserve slavery in the United States, which they saw as threatened because of the election of Abraham Lincoln and the growing abolitionist movement in the North. The war ended with Union victory, the dissolution of the Confederacy and the abolition of slavery, freeing four million African Americans.

Madison Square Garden (1879–1890) was an arena in New York City at the northeast corner of East 26th Street and Madison Avenue in Manhattan. The first venue to use that name, it seated 10,000 spectators. It was replaced with a new building on the same site.

The Johnstown Flood, sometimes referred to locally as the Great Flood of 1889, occurred on Friday, May 31, 1889, after the catastrophic failure of the South Fork Dam, located on the south fork of the Little Conemaugh River, 14 miles (23 km) upstream of the town of Johnstown, Pennsylvania, United States. The dam ruptured after several days of extremely heavy rainfall, releasing 14.55 million cubic meters of water. With a volumetric flow rate that temporarily equaled the average flow rate of the Mississippi River, the flood killed 2,208 people and accounted for US$17 million in damage.

The Morral affair was the attempted regicide of Spanish King Alfonso XIII and his bride, Queen Victoria Eugenie, on their wedding day, 31 May 1906, and its subsequent effects. The attacker, Mateu Morral, acting on a desire to spur revolution, threw a bomb concealed in a floral bouquet from a Madrid hotel window as the King's procession passed, killing 24 bystanders and soldiers and wounding over 100 others, while leaving the royals unscathed. Morral sought refuge from republican journalist José Nakens but fled in the night to Torrejón de Ardoz, whose villagers reported the interloper. Two days after the attack, militiamen accosted Morral, who killed one before killing himself. Morral was likely involved in a similar attack on the king a year earlier.

The South Africa Act 1909 was an act of the Parliament of the United Kingdom that created the Union of South Africa out of the former Cape, Natal, Orange River, and Transvaal colonies, and served as the constitution of the Union from 1910 until 1961. The act also allowed for potential admission of Rhodesia into the Union, a proposal rejected by Rhodesian colonists in a 1922 referendum. The draft proposal was supported by the four colonial parliaments, but was opposed by Cape Colony premier W. P. Schreiner, who raised concerns that it would strip rights from non-white South Africans.

The president of Mexico, officially the president of the United Mexican States, is the head of state and head of government of Mexico. Under the Constitution of Mexico, the president heads the executive branch of the federal government and is the commander in chief of the Mexican Armed Forces. The office, which was first established by the federal Constitution of 1824, is currently held by Claudia Sheinbaum, who was sworn in on October 1, 2024. The office of the president is considered to be revolutionary, in the sense that the powers of office are derived from the Revolutionary Constitution of 1917. Another legacy of the Mexican Revolution is the Constitution's ban on re-election. Mexican presidents are limited to a single six-year term, called a sexenio. No one who has held the post, even on a caretaker basis, is allowed to run or serve again. The constitution and the office of the president closely follow the presidential system of government.

The Tulsa race massacre was a two-day-long terrorist massacre perpetrated by white supremacists that took place in the Greenwood District of Tulsa, Oklahoma, United States, between May 31 and June 1, 1921. Mobs of white residents, some of whom had been armed and appointed as deputies by city government officials, attacked black residents and their homes and businesses. The attackers burned and destroyed more than 35 square blocks of the neighborhood—at the time, one of the wealthiest black communities in the United States, colloquially known as "Black Wall Street." The event is considered one of the worst incidents of racial violence in American history.

An earthquake occurred on 31 May 1935 between 2:30 am and 3:40 am at Quetta, Baluchistan Agency, close to the border with southern Afghanistan. The earthquake had a magnitude of 7.7 Mw and anywhere between 30,000 and 60,000 people died from the impact. It was recorded as the deadliest earthquake to strike South Asia until 2005. The quake was centred 4 km south-west of Ali Jaan, Balochistan, British India.

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. Tanks and aircraft played major roles, the latter enabling the strategic bombing of cities and delivery of the only nuclear weapons used in war. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

The Uniform Code of Military Justice (UCMJ) is the foundation of the system of military justice of the armed forces of the United States. The UCMJ was established by the United States Congress in accordance with their constitutional authority, per Article I Section 8 of the U.S. Constitution, which provides that "The Congress shall have Power. .. to make Rules for the Government and Regulation of the land and naval forces" of the United States.

The Constitution of 1961 was the fundamental law of South Africa for two decades. Under the terms of the constitution South Africa ceased to be a Commonwealth realm and became a republic, albeit, temporarily, outside the Commonwealth of Nations from 1961 to 1994.

The West Indies Federation, also known as the West Indies, the Federation of the West Indies or the West Indian Federation, was a short-lived political union that existed from 3 January 1958 to 31 May 1962. Various islands in the Caribbean that were part of the British Empire, including Trinidad and Tobago, Barbados, Jamaica, and those on the Leeward and Windward Islands, came together to form the Federation, with its capital in Port of Spain, Trinidad and Tobago. The expressed intention of the Federation was to create a political unit that would become independent from Britain as a single state – possibly similar to Australia, Canada, or Rhodesia and Nyasaland. Before that could happen, the Federation collapsed due to internal political conflicts over how it would be governed or function viably. The formation of a West Indian Federation was encouraged by the United Kingdom, but also requested by pan-Caribbean nationalists.

The Uniform Monday Holiday Act is an Act of Congress that permanently moved two federal holidays in the United States to a Monday, being Washington's Birthday and Memorial Day, and further made Columbus Day a federal holiday, also permanently on a Monday. This created long weekends with three days off ending with the holidays, such as Memorial Day Weekend.

Indian Airlines Flight 440 was a flight on 31 May 1973 that crashed while on approach to Palam Airport killing 48 of the 65 passengers and crew on board.

The 1985 United States–Canada tornado outbreak, referred to as the Barrie tornado outbreak in Canada, was a major tornado outbreak that occurred in Ohio, Pennsylvania, New York, and Ontario, on May 31, 1985. In all, 44 tornadoes were counted including 14 in Ontario, Canada. Ninety people were killed, with 14 deaths occurring in Canada, and 76 occurring in the United States. It remains the largest and most intense tornado outbreak ever to hit this region, and the worst tornado outbreak in Pennsylvania history in terms of deaths and destruction.

The Bicesse Accords, also known as the Estoril Accords, laid out a transition to multi-party democracy in Angola under the supervision of the United Nations' UNAVEM II mission. President José Eduardo dos Santos of the MPLA and Jonas Savimbi of UNITA signed the accord in Lisbon, Portugal on May 31, 1991. UNITA rejected the official results of the 1992 presidential election and renewed their guerrilla war.

Air France, stylised as AIRFRANCE, is the flag carrier of France, and is headquartered in Tremblay-en-France. The airline is a subsidiary of the Air France–KLM Group and is one of the founding members of the SkyTeam airline alliance. As of 2013, Air France served 29 destinations in France and operates worldwide scheduled passenger and cargo services to 201 destinations in 78 countries and also carried 46,803,000 passengers in 2019. The airline maintains its global and domestic hub at Charles de Gaulle Airport. Air France's corporate headquarters, previously in Montparnasse, Paris, are located at the Roissypôle complex on the grounds of Charles de Gaulle Airport, north of Paris.

Usain St. Leo Bolt is a Jamaican retired sprinter. Widely regarded as the greatest sprinter of all time, he is an eight-time Olympic gold medalist and the world record holder in the 100 metres, 200 metres, and 4 × 100 metres relay.

Shayetet 13 is a naval commando unit of the Israeli Navy and one of the primary reconnaissance units of the Israel Defense Forces. Shayetet 13 specializes in sea-to-land incursions, counter-terrorism, sabotage, maritime intelligence gathering, maritime hostage rescue, and boarding. The unit is trained for sea, air and land actions. The unit has taken part in almost all of Israel's major wars, as well as other actions.

The 2013 El Reno tornado was an extremely large, intense, and erratic tornado that occurred and hit a rural part of Central Oklahoma during the early evening of May 31, 2013. This rain-wrapped, multiple-vortex tornado was the widest tornado ever recorded, peaking at 2.6 miles across. It was part of a larger weather system that produced dozens of tornadoes over the preceding days. The tornado initially formed at 6:03 p.m. CDT (23:03 UTC) about 8.3 miles (13.4 km) west-southwest of El Reno, rapidly growing in size and becoming more violent as it tracked through central Canadian County. Remaining over mostly open terrain, the tornado did not impact many structures; however, measurements from mobile weather radars revealed extreme instantaneous winds in excess of 313 mph (504 km/h) within sub-vortices. These are among the highest observed wind speeds on Earth, just slightly lower than the wind speeds of the 1999 Bridge Creek–Moore tornado. As it crossed U.S. 81, it had grown to a record-breaking width of 2.6 miles (4.2 km), beating the previous width record set in 2004. Turning northeastward, the tornado soon weakened. Upon crossing Interstate 40, the tornado dissipated around 6:43 p.m. CDT (23:43 UTC), after tracking for 16.2 miles (26.1 km). It avoided affecting more densely populated areas near and within the Oklahoma City metropolitan area.

On May 31, 2019, a mass shooting occurred at a municipal building in the Princess Anne area of Virginia Beach, Virginia, United States. The gunman, 40-year-old DeWayne Craddock, a disgruntled city employee, fatally shot 12 people and wounded four others before he was killed by responding police officers during an exchange of gunfire. It is the second-deadliest workplace shooting in U.S. history after the 1986 Edmond post office shooting and the deadliest mass shooting in Virginia since the 2007 Virginia Tech shooting.