25 March 1963

Invasion of Anjouan began as Comoros and African Union forces launched an assault to remove Mohamed Bacar from power in Anjouan.

A gunman in Seattle, Washington, U.S., entered a rave afterparty and opened fire, killing six and wounding two, before committing suicide.

Protesters demanding a new election in Belarus, following the presidential vote days earlier, were arrested, including opposition leader Alyaksandr Kazulin.

American computer programmer Ward Cunningham established the first wiki site, the WikiWikiWeb.

King Faisal of Saudi Arabia was shot and killed by his nephew Faisal bin Musaid.

The Soviet Union began mass deportations of more than 90,000 "undesirable" people from the Baltic states to Siberia.

Meteorologists at Tinker Air Force Base in Oklahoma City, United States, issued the world's first tornado forecast after noticing conditions similar to another tornado that had struck five days earlier.

Enrico Fermi published his discovery of neutron-induced radioactivity, for which he was awarded the Nobel Prize in Physics.

Following the overthrow of the Russian tsar Nicholas II, Georgia's bishops unilaterally restored the autocephaly of the Georgian Orthodox Church.

World War I: A delayed action bomb left by German troops exploded in the town hall of Bapaume, France, killing 24 soldiers and civilians.

The appointment of Mehmed Reshid as governor of Diyarbekir, Turkey, intensified the genocide of Syriac Christians by pro-Ottoman forces.

The Triangle Shirtwaist Factory fire in New York City killed 146 sweatshop workers, many of whom could not escape because the doors to the stairwells and exits had been locked.

The Scottish National Antarctic Expedition (ship pictured) anchored in the South Orkney Islands with the intention of establishing the first weather station in Antarctic territory.

The Slave Trade Act, which abolished the Atlantic slave trade in the British Empire, received royal assent.

War of the Second Coalition: In their second battle in seven days, the French Army of the Danube and Habsburg forces battled for control of the Hegau region.

American Revolutionary War: American Patriot forces in Georgia conducted a raid on Tybee Island, with the primary goal of capturing runaway slaves seeking refuge with the British.

Jacobite risings: A French fleet anchored near Fife Ness as part of a planned French invasion of Britain.

Dutch astronomer Christiaan Huygens discovered Titan, the largest natural satellite of Saturn.

Wars of the Roses: A formal reconciliation ceremony between the Lancastrians and Yorkists led to a brief period of peace.

The Yongle Emperor of the Ming dynasty launched the first of his military campaigns against the Mongols, resulting in the fall of the Mongol khan Bunyashiri.

Byzantine emperor Theodosius III abdicated in favour of Leo the Isaurian after he captured Theodosius's son.

Syrian civil war: Following the completion of the Afrin offensive, the Syrian Democratic Forces (SDF) initiate an insurgency against the Turkish occupation of the Afrin District.

Protesters demanding a new election in Belarus, following the rigged 2006 Belarusian presidential election, clash with riot police. Opposition leader Aleksander Kozulin is among several protesters arrested.

The European Union's Veterinarian Committee bans the export of British beef and its by-products as a result of mad cow disease (Bovine spongiform encephalopathy).