February 13

Mongol forces under Hulegu Khan sack and plunder Baghdad following the city's surrender, killing a large portion of its population and destroying its famed libraries.

Following the city's surrender, Mongol forces spent days massacring residents and destroying Baghdad's mosques, palaces, and legendary House of Wisdom library, whose vast collection of manuscripts was reportedly dumped into the Tigris River. The sack effectively ended the Abbasid Caliphate's five centuries of rule and is often cited as a devastating blow to the broader Islamic Golden Age.

Catherine Howard, the fifth wife of Henry VIII, is executed for adultery, following the same fate as Anne Boleyn six years earlier.

Catherine Howard, a teenage cousin of Anne Boleyn, was accused of adultery and treason after evidence emerged of relationships before and possibly during her marriage to the aging Henry VIII. Her execution, following the same procedure used against Anne Boleyn, underscored the perilous position of Henry's wives.

William III and Mary II are proclaimed joint monarchs of England following the Glorious Revolution that deposed James II.

William and Mary's joint rule followed the largely bloodless Glorious Revolution, in which Parliament invited the Dutch prince William to invade and depose the unpopular Catholic King James II. Their acceptance of a Bill of Rights limiting royal power marked a pivotal shift toward constitutional monarchy in England.

Government soldiers massacre members of Clan MacDonald at Glencoe, Scotland, an act of betrayal that became a lasting symbol of Highland grievance.

Government soldiers who had been given hospitality by the MacDonald clan for nearly two weeks turned on their hosts under secret orders, killing dozens in their beds in a notorious breach of the traditional Highland code of hospitality. The massacre remains a potent symbol of clan grievance and government treachery in Scottish memory.

The 13th Dalai Lama proclaims Tibetan independence following the collapse of Qing dynasty authority over the region.

The young Dalai Lama's declaration came as Qing dynasty authority in China collapsed amid revolution, allowing Tibet to function with de facto independence for the following decades. The territory's political status remained contested internationally, and Chinese forces reasserted control in 1950.

The Siege of Budapest ends with the unconditional surrender of German and Hungarian forces to the Red Army after a brutal two-month battle.

The prolonged Siege of Budapest, one of the most destructive urban battles of World War II, devastated the Hungarian capital and its historic bridges and buildings. Soviet forces suffered massive casualties capturing the city, which became an important staging ground for the final push into Germany and Austria.

British and American bombers begin a devastating firebombing campaign against Dresden, Germany, killing thousands and destroying much of the historic city.

The controversial firebombing of Dresden, a city with limited military-industrial significance, used incendiary bombs to create a massive firestorm that killed an estimated 25,000 civilians in a matter of days. It remains one of the most debated Allied actions of the war regarding the ethics of targeting civilian population centers.

France conducts its first nuclear weapons test in the Algerian desert, becoming the world's fourth nuclear power.

France's "Gerboise Bleue" test, conducted in the Algerian Sahara despite the ongoing Algerian War of Independence, made it the world's fourth nuclear power after the United States, Soviet Union, and Britain. The test cemented France's independent nuclear deterrent, a policy it maintained throughout the Cold War outside NATO's integrated command.

Coalition smart bombs destroy the Amiriyah shelter in Baghdad during the Gulf War, killing over 400 Iraqi civilians sheltering inside.

U.S. forces had targeted the Amiriyah facility believing it was a military command bunker, unaware that hundreds of civilians were sheltering inside from ongoing airstrikes. The devastating civilian toll became one of the most controversial incidents of the Gulf War and a rallying point for anti-war criticism.

Kim Jong-nam, the estranged half-brother of North Korean leader Kim Jong-un, is assassinated with a nerve agent at a Malaysian airport.

Kim Jong-nam, once considered a potential heir to North Korea's leadership before falling out of favor, was killed with VX nerve agent by two women in a Kuala Lumpur airport who later claimed they believed they were participating in a prank for a hidden-camera show. The brazen assassination drew international condemnation and strained Malaysia-North Korea relations.