September 21 in History

The Roman emperor was the ruler of the Roman Empire, starting with the granting of the title augustus to Octavian in 27 BC. The title of imperator, originally a military honorific, was usually used alongside caesar, originally a cognomen. When a given Roman is described as becoming emperor in English, it generally reflects his accession as augustus, and later as basileus. Early emperors also used the title princeps alongside other Republican titles, notably consul and pontifex maximus.

Eparchius Avitus (died 456/7) was Roman emperor of the Western Empire from July 455 to October 456. He was a senator of Gallic extraction and a high-ranking officer both in the civil and military administration, as well as Bishop of Piacenza. He opposed the reduction of the Western Roman Empire to Italy alone, both politically and from an administrative point of view. For this reason, as Emperor he introduced several Gallic senators in the Imperial administration; this policy, however, was opposed by the senatorial aristocracy and by the people of Rome, who had suffered from the sack of the city by the Vandals in 455. Avitus had a good relationship with the Visigoths, in particular with their king Theodoric II, who was a friend of his and who acclaimed Avitus Emperor. The possibility of a strong and useful alliance between the Visigoths and Romans faded, however, when Theodoric invaded Hispania at Avitus's behest, which rendered him unable to help Avitus against the rebel Roman generals who deposed him.

The Anglo-Norman invasion of Ireland took place during the late 12th century, when Anglo-Normans and Cambro-Normans gradually conquered and acquired large swathes of land in Ireland over which the monarchs of England then claimed sovereignty. The Anglo-Normans claimed the invasion was sanctioned by the papal bull Laudabiliter. Gaelic Ireland then consisted of several kingdoms, with a High King claiming lordship over most of the other kings. The Anglo-Norman invasion was a watershed in Ireland's history, marking the beginning of over 800 years of British presence in Ireland. In May 1169, Anglo-Norman mercenaries landed in Ireland at the request of Diarmait mac Murchada (Dermot MacMurragh), the deposed King of Leinster, who sought their help in regaining his kingship. They achieved this within weeks and raided neighbouring kingdoms. This military intervention was sanctioned by King Henry II of England. In return, Diarmait had sworn loyalty to Henry and promised land to the Normans. In 1170, there were further Norman landings, led by the Earl of Pembroke, Richard "Strongbow" de Clare. They seized the important Norse-Irish towns of Dublin and Waterford, and Strongbow married Diarmait's daughter Aoífe. Diarmait died in May 1171, and Strongbow claimed Leinster, which Diarmait had promised him. Led by High King Ruaidrí Ua Conchobair (Rory O'Conor), a coalition of most of the Irish kingdoms besieged Dublin, while Norman-held Waterford and Wexford were also attacked. However, the Normans managed to hold most of their territory. In October 1171, King Henry landed with a large army to assert control over both the Anglo-Normans and the Irish. This intervention was supported by the Roman Catholic Church, who saw it as a means of ensuring Irish religious reform, and a source of taxes. At the time, Irish marriage laws conflicted with those of the broader Church, and the Gregorian Reform had not been fully implemented. Henry granted Strongbow Leinster as a fiefdom, declared the Norse-Irish towns to be crown land, and arranged the synod of Cashel to reform the Irish church. Many Irish kings also submitted to him, likely in the hope that he would curb Norman expansion, but Henry granted the unconquered kingdom of Meath to Hugh de Lacy. After Henry's departure in 1172, fighting between the Normans and Irish continued. The 1175 Treaty of Windsor acknowledged Henry as overlord of the conquered territory and Ruaidrí as overlord of the remainder of Ireland, with Ruaidrí also swearing fealty to Henry. The treaty soon collapsed: Norman lords continued to invade Irish kingdoms and the Irish continued to attack the Normans. In 1177, Henry adopted a new policy. He declared his son John to be the "Lord of Ireland" (i.e. claiming the whole island) and authorised the Norman lords to conquer more land. The territory they held became the Lordship of Ireland, part of the Angevin Empire. The Normans' success has been attributed to military superiority and fortress-building, the lack of a unified opposition from the Irish and the support of the Church for Henry's intervention.

The Livonian crusade consisted of the various military Christianisation campaigns in medieval Livonia – modern Latvia and Estonia – during the Papal-sanctioned Northern Crusades in the 12th–13th century.

The Congress of Arras was a diplomatic congregation established at Arras in the summer of 1435 during the Hundred Years' War, between representatives of England, France and Burgundy. It was the first negotiation since the Treaty of Troyes and replaced the fifteen-year agreement between Burgundy and England that would have seen the dynasty of Henry V inherit the French crown. Historian Richard Vaughan has called it "Europe's first real peace congress". Toward the close of the Hundred Years' War, both the Congress and the subsequent Treaty of Arras represented diplomatic failures for England and major successes for France and led to the expulsion of the English from France.

Lieutenant-General Sir John Cope (July 1688 – 28 July 1760) was a British Army officer and Whig politician. He is now chiefly remembered for his defeat at Prestonpans, the first significant battle of the Jacobite rising of 1745 and which was commemorated by the tune "Hey, Johnnie Cope, Are Ye Waking Yet?", which still features in modern Scottish folk music and bagpipe recitals. His military service included the wars of the Spanish and Austrian Successions. As with many of the senior officers present at Dettingen in 1743, victory resulted in promotion, and he was appointed military commander in Scotland shortly before the 1745 Rising. Although exonerated by a court-martial in 1746, Prestonpans ended his career as a field officer. In 1751, he was appointed governor of the Limerick garrison, and deputy to Viscount Molesworth, commander of the army in Ireland. He died in London on 28 July 1760.

New York, often called New York City (NYC), is the most populous city in the United States. It is located at the southern tip of New York State on New York Harbor, one of the world's largest natural harbors. The city comprises five boroughs—Manhattan, Brooklyn, Queens, the Bronx, and Staten Island—each being coextensive with its respective county. It is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of technology, finance and commerce, culture, entertainment and media, academics and scientific output, the arts and fashion—and as home to the headquarters of the United Nations, international diplomacy. New York City is known for its fast pace and continuous urban energy. With an estimated population of 8,586,038 as of 2026, distributed over 300.46 square miles (778.2 km2), New York is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the country's second-most populous city. More than 20.1 million people live in New York City's metropolitan statistical area, and approximately 23.5 million people live in its combined statistical area as of 2020; both are the largest in the U.S. New York City is one of the world's most populous megacities. The city and its metropolitan area serve as the premier gateway for legal immigration to the United States. An estimated 800 languages are spoken in New York City, making it the most linguistically diverse city in the world. The New York City metropolitan region is home to the largest foreign-born population of any metropolitan region in the world, numbering approximately 5.9 million people as of 2023. Manhattan Island was inhabited by Munsee-speaking Lenape around 1624. By then, Dutch colonists had established Fort Amsterdam as a center of trade on the island. This was the first European settlement in what would become New York City. The settlement was named New Amsterdam in 1626 and was chartered as a city in 1653. The city came under English control in 1664 and was temporarily renamed New York after Charles II granted the lands to his brother, the Duke of York, before this name was permanently adopted in 1674. Following independence from the Kingdom of Great Britain, the city was the national capital of the United States from 1785 until 1790. The modern city was formed by the 1898 consolidation of its five boroughs. Anchored by Wall Street in Manhattan's Financial District, New York City has been called both the world's premier financial and fintech center and the most economically powerful city in the world. As of 2024, the New York metropolitan area is the largest metropolitan economy in the world, with a gross metropolitan product of over US$2.44 trillion. The New York metropolitan area's economy is larger than all but nine countries. Despite having a 24/7 rapid transit system, New York also leads the world in urban automobile traffic congestion. The city is home to the world's two largest stock exchanges by market capitalization of their listed companies: the New York Stock Exchange and Nasdaq. New York City is an established haven for global investors. As of 2025, New York City is the most expensive city in the world for expatriates and has the highest residential rent costs of any American city; New York County (Manhattan) is by a significant margin the most expensive U.S. county in terms of average home price per square foot and produces the highest U.S. county GDP by both absolute and per capita measures. Fifth Avenue is an ultra-luxury international shopping corridor that is undergoing additional infrastructure investment. Amidst escalating affordability concerns, New York City is home to the highest number of billionaires, individuals of ultra-high net worth (greater than US$30 million), and millionaires of any city in the world by a significant margin.

The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence or simply the American Revolution, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continental Army and, commanded by George Washington, defeated the British Army. The conflict was fought in North America, the Caribbean, and the Atlantic Ocean. The war's outcome seemed uncertain for most of the war, but Washington and the Continental Army's decisive victory in the Siege of Yorktown in 1781 led King George III and the Kingdom of Great Britain to negotiate an end to the war. In 1783, in the Treaty of Paris, the British monarchy acknowledged the independence of the Thirteen Colonies, leading to the establishment of the United States as an independent and sovereign nation. In 1763, after the British Empire gained dominance in North America following its victory over the French in the Seven Years' War, tensions and disputes began escalating between the British and the Thirteen Colonies, especially following passage of the Stamp and Townshend Acts. The British Army responded by seeking to occupy Boston militarily, leading to the Boston Massacre on March 5, 1770. In mid-1774, with tensions escalating even further between the British Army and the colonies, the British Parliament imposed the Intolerable Acts, an attempt to disarm Americans, leading to the Battles of Lexington and Concord in April 1775, the first battles of the Revolutionary War. In June 1775, the Second Continental Congress voted to incorporate colonial-based Patriot militias into a central military, the Continental Army, and unanimously appointed Washington its commander-in-chief. Two months later, in August 1775, George III declared the colonies to be in a state of rebellion. In July 1776, the Second Continental Congress formalized the war, passing the Lee Resolution on July 2, and, two days later, unanimously adopting the Declaration of Independence, on July 4. In March 1776, in an early win for the newly-formed Continental Army under Washington's command, following a successful siege of Boston, the Continental Army successfully drove the British Army out of Boston. British commander in chief William Howe responded by launching the New York and New Jersey campaign, which resulted in Howe's capture of New York City in November. Washington responded by clandestinely crossing the Delaware River and winning small but significant victories at Trenton and Princeton. In the summer of 1777, as Howe was poised to capture Philadelphia, the Continental Congress fled to Baltimore. In October 1777, a separate northern British force under the command of John Burgoyne was forced to surrender at Saratoga in an American victory that proved crucial in convincing France and Spain that an independent United States was a viable possibility. France signed a commercial agreement with the revolutionaries, followed by a Treaty of Alliance in February 1778. In 1779, the Sullivan Expedition undertook a scorched earth campaign against British-allied factions of the Haudenosaunee Confederacy (also Iroquois). Native American raids on the American frontier, however, continued to be a problem. Also, in 1779, Spain allied with France against Great Britain in the Treaty of Aranjuez, though Spain did not formally ally with the Americans. Howe's replacement Henry Clinton intended to take the war against the Americans into the Southern Colonies. Despite some initial success, British General Cornwallis was besieged by a Franco-American army in Yorktown, Virginia, in September and October 1781. The French navy cut off Cornwallis's escape and he was forced to surrender in October. The British wars with France and Spain continued for another two years, but fighting largely ceased in North America. In the Treaty of Paris, signed on September 3, 1783, Great Britain acknowledged the sovereignty and independence of the United States, bringing the American Revolutionary War to an end. The Treaties of Versailles resolved Great Britain's conflicts with France and Spain, and forced Great Britain to cede Tobago, Senegal, and small territories in India to France, and Menorca, West Florida, and East Florida to Spain.

The Secretary of State for War and the Colonies was a British cabinet-level position responsible for the army and the British colonies. The secretary was supported by an Under-Secretary of State for War and the Colonies.

The War of 1812 was a conflict initiated by the United States against the United Kingdom and its allies fought mainly in North America and at sea during the wider Napoleonic Wars. The United States declared war on Britain on 18 June 1812. Although peace terms were agreed upon in the December 1814 Treaty of Ghent, the war did not officially end until the peace treaty was ratified by the United States Senate on 17 February 1815.

The schooner Ancud was the ship sent by Chile in 1843 to claim sovereignty over the Strait of Magellan and establish Fuerte Bulnes, the first Chilean settlement in the strait. It was built for the purpose in the city of San Carlos de Ancud and commanded by John Williams Wilson, a British-born Chilean captain.

The Second Opium War (simplified Chinese: 第二次鸦片战争; traditional Chinese: 第二次鴉片戰爭), also known as the Second Anglo-Chinese War or Arrow War, was fought between the United Kingdom and France against the Qing dynasty of China between 1856 and 1860. It was the second major conflict in the Opium Wars, which were fought over the right to import opium to China, and resulted in a second defeat for the Qing and the forced legalisation of the opium trade. It caused many Chinese officials to believe that conflicts with the Western powers were no longer traditional wars, but part of a looming national crisis. On 8 October 1856, Qing officials seized the Arrow, a British-registered cargo ship, and arrested its Chinese sailors. The British consul, Harry Parkes, protested, upon which the viceroy of Liangguang, Ye Mingchen, delivered most of the sailors to the British on 22 October, but refused to release the rest. The next day, British gunboats shelled the city of Canton. The British government decided to seek redress from China and dispatched a naval force led by Michael Seymour, and France joined in the action, citing as its reason the murder of a French missionary in China. After coordination with each other, the British and French stormed Canton in December 1857. Ye was captured and the governor of Guangdong surrendered. The alliance then moved north to demand a treaty from the Qing court, and on 20 May 1858, captured the Taku Forts, stormed Tianjin, and threatened the capital Beijing. The Qing asked for peace, and signed the Treaty of Tientsin with Great Britain and France in 1858. However, the Xianfeng Emperor refused to ratify the treaty, after which the Qing general Sengge Rinchen restarted the war with the British and French that month. Allied reinforcements sailed from Hong Kong, and his troops were defeated. As the alliance's forces advanced toward Beijing, Parkes and a number of British and French officers were captured as hostages, and some were tortured or murdered. These events prompted Lord Elgin to order his soldiers to loot and burn the Old Summer Palace as soon as they captured Beijing. The emperor and his entourage fled to Rehe, while Prince Gong stayed to conduct the negotiations, signing the Convention of Peking with the alliance on 24 October 1860, thus ratifying the Treaty of Tientsin and bringing the Second Opium War to an end. During and after the Second Opium War, the Qing government was also forced to sign treaties with Russia, such as the Treaty of Aigun and the Convention of Peking. As a result, China ceded more than 1.5 million square kilometres (0.58 million square miles) of territory to Russia in its north-east and north-west. With the conclusion of the war, the Qing government was able to concentrate on countering the Taiping Rebellion and maintaining its rule. Among other things, the Convention of Peking ceded the Kowloon Peninsula to the British as part of Hong Kong.

The Taiping Rebellion, also known as the Taiping Civil War, Revolution, or Movement, was a civil war in late imperial China between the Qing dynasty and the rebel Taiping Heavenly Kingdom. The conflict lasted 14 years, from its outbreak in 1850 until the fall of Taiping-controlled Nanjing—which had been renamed to Tianjing —in 1864. The last rebel forces were defeated in August 1871. Estimates of the conflict's death toll range between 20 to 30 million people, representing 5–10% of China's population at that time, while higher estimates range from 73 to 100 million, roughly up to one quarter of the Chinese population at that time, making it perhaps the deadliest civil war in all of human history. While the Qing ultimately defeated the rebellion, the victory came at a great cost to the state's economic and political viability.

The Anglo-Egyptian conquest of Sudan, also called the Dongola Campaign or the Sudan Campaign, was a reconquest of territory lost by the Khedives of Egypt in 1884–1885 during the Mahdist War.

Empress Dowager Cixi (Mandarin pronunciation: [tsʰɹ̩̌.ɕì]; 29 November 1835 – 15 November 1908) was a Manchu noblewoman of the Yehe Nara clan who periodically controlled the government of the late Qing dynasty as empress dowager and regent from 1861 until her death in 1908. Cixi was selected as a concubine of the Xianfeng Emperor in her adolescence and gave birth to his son, Zaichun, in 1856. After the Xianfeng Emperor's death in 1861, their son became the Tongzhi Emperor, and Cixi assumed the role of co-empress dowager alongside Xianfeng's widow, Empress Dowager Ci'an. She and Ci'an ousted a group of regents appointed by the late emperor and assumed the regency together. Cixi then consolidated control over the dynasty when she installed her nephew as the Guangxu Emperor at the death of the Tongzhi Emperor in 1875. Ci'an continued to be co-regent with Cixi until her death in 1881. Cixi oversaw the Tongzhi Restoration, during which she rejected Western political institutions but supported technological and military modernization. In 1898, she suppressed the Hundred Days' Reform initiated by the Guangxu Emperor and placed him under house arrest for the remainder of his life, likely eventually having him murdered by arsenic poisoning. (Though it is also speculated that Yuan Shikai may have been the one who may have murdered him due to potential reprisals against him due to his role in supporting Empress Dowager Cixi's coup, there are no reliable sources to prove who murdered the Guangxu Emperor.) During the Boxer Rebellion, Cixi initially supported the Boxers and declared war on the foreign powers, a decision that led to the occupation of Beijing by the Eight-Nation Alliance and her flight to Xi'an. After the humiliating Boxer Protocol pushed the Qing dynasty to the brink of collapse, she initiated reforms aimed at establishing a constitutional monarchy. Cixi died in November 1908, two days after the Guangxu Emperor, leaving power in the hands of conservative regents amid a deeply divided and unstable society. Cixi's legacy remains contested. While widely portrayed as a ruthless reactionary, she has been reassessed by some revisionist historians who argue that she was scapegoated for structural problems beyond her control. These scholars credit her with pursuing pragmatic reform in contrast to the Guangxu Emperor's radicalism, maintaining political order under intense imperialist pressure, and supporting institutions such as the Beiyang Army and Peking University.

The Oppau explosion occurred on September 21, 1921, when approximately 4,500 tonnes of a mixture of ammonium sulfate and ammonium nitrate fertilizer stored in a tower silo exploded at a BASF plant in Oppau, now part of Ludwigshafen, Germany, killing at least 560 people and injuring about 2,000 more.

Salvador Lutteroth González (21 March 1897 – 5 September 1987) was a Mexican professional wrestling promoter of the mid-twentieth century. Lutteroth's organization, Empresa Mexicana de Lucha Libre (EMLL), was the dominant Mexican wrestling promotional enterprise from its founding in 1933 until Lutteroth left the company in the 1950s. Under its current name of Consejo Mundial de Lucha Libre (CMLL), it is, to date, the longest-running active professional wrestling promotion in the world presenting three weekly shows. Lutteroth was known as the father of Mexican professional wrestling or lucha libre and, in his position as promoter and booker of the dominant promotion, was the most powerful man in Mexican wrestling, and one of the most powerful wrestling executives in the world. He was, in large part, responsible for the widespread fame of the most famous Mexican professional wrestlers of the mid-twentieth century, such as Octavio Gaona, the first Mexican wrestler to win the middleweight championship of the world by defeating Gus Kallio, Carlos Tarzán López, El Santo, Gory Guerrero, René Guajardo, Karloff Lagarde, Enrique Llanes, and the international league wrestler Medico Asesino, Rito Romero, Dorrel Dixon and Mil Máscaras, who wrestled in the United States, Japan, and Europe.

In September 1934, a violent typhoon caused tremendous devastation in Japan, leaving more than 3,000 people dead in its wake. Dubbed the Muroto typhoon (室戸台風, Muroto Taifū), the system was first identified on September 13 over the western Federated States of Micronesia. Moving generally northwest, it eventually brushed the Ryukyu Islands on September 20. Turning northeast, the typhoon accelerated and struck Shikoku and southern Honshu the following morning. It made landfalls in Muroto, Kaifu, Awaji Island, and Kobe. A pressure of 911.9 hPa (26.93 inHg) was observed in Muroto, making the typhoon the strongest ever recorded to impact Japan at the time. This value was also the lowest land-based pressure reading in the world on record at the time; however, it was surpassed the following year during the 1935 Labor Day hurricane. After clearing Japan, the now extratropical storm traveled east and weakened. Turning north by September 24, the system deepened and impacted the Aleutian Islands; it was last noted the following day over western Alaska. Regarded at the time as the "second-greatest catastrophe of modern Japan" after the 1923 Great Kantō earthquake, the storm left parts of Osaka in ruins. Tens of thousands of structures were damaged or destroyed, leaving approximately 200,000 people homeless. Among the 3,066 people killed were 421 children and teachers who perished when their flimsy schools were destroyed. That ranked it, at the time, as the deadliest typhoon in Japanese history. In addition to the fatalities, 13,184 people were injured. Total damage exceeded $300 million (1934 USD).

John Ronald Reuel Tolkien (; 3 January 1892 – 2 September 1973) was an English writer and academic philologist. He was the author of the high fantasy works The Hobbit (1937) and The Lord of the Rings (1954–1955). From 1925 to 1945 Tolkien was the Rawlinson and Bosworth Professor of Anglo-Saxon and a Fellow of Pembroke College, both at the University of Oxford. He then moved within the same university to become the Merton Professor of English Language and Literature and Fellow of Merton College, and held these positions from 1945 until his retirement in 1959. Tolkien was a devout Catholic and a close friend of C. S. Lewis, a co-member of the Inklings, an informal literary discussion group. He was appointed a Commander of the Order of the British Empire by Elizabeth II on 28 March 1972. After Tolkien's death, his son Christopher published a series of works based on his father's extensive notes and unpublished manuscripts, including The Silmarillion. These, together with The Hobbit and The Lord of the Rings, form a connected body of tales, poems, fictional histories, invented languages, and literary essays about a fantasy world called Arda and, within it, Middle-earth. Between 1951 and 1955 Tolkien applied the term legendarium to the larger part of these writings. While many other authors had published works of fantasy before Tolkien, the tremendous success of The Hobbit and The Lord of the Rings ignited a profound interest in the fantasy genre and ultimately precipitated an avalanche of new fantasy books and authors. This has led to his popular identification as the "father" of modern fantasy literature. He is widely regarded as one of the most influential authors of all time.

The 1938 New England Hurricane (also referred to as the Great Long Island - New England Hurricane and the Long Island Express) was one of the deadliest and most destructive tropical cyclones to strike the United States. The storm formed near the coast of Africa on September 9, becoming a Category 5 hurricane on the Saffir–Simpson hurricane scale, before making landfall as a Category 3 hurricane on Long Island on Wednesday, September 21. It is estimated that the hurricane killed 682 people, damaged or destroyed more than 57,000 homes and caused property losses estimated at $306 million ($4.7 billion in 2024). Also, numerous others estimate the real damage between $347 million and almost $410 million. Damaged trees and buildings were still seen in the affected areas as late as 1951. It remains the most powerful and deadliest hurricane to ever strike New York State and New England in history, perhaps eclipsed in landfall intensity only by the Great Colonial Hurricane of 1635. The storm developed into a tropical depression on September 9 off the coast of West Africa, but the United States Weather Bureau was unaware that a tropical cyclone existed until September 16 when ships reported strong winds and rough seas 350 miles northeast of San Juan; by then, it was already a well-developed hurricane and had tracked westward toward the southeastern Bahamas. It reached hurricane strength on September 15 and continued to strengthen to a peak intensity of 160 mph (260 km/h) near the southeastern Bahamas four days later, making it a Category 5-equivalent hurricane. The storm was propelled northward, rapidly paralleling the East Coast before making landfalls on Long Island and Connecticut as a Category 3 hurricane on September 21, with estimated sustained winds of 115–120 mph. After moving inland, it transitioned into an extratropical cyclone and dissipated over Ontario on September 23.

Armand Călinescu (4 June 1893 – 21 September 1939) was a Romanian economist and politician, who served as 39th Prime Minister from March 1939 until his assassination six months later. He was a staunch opponent of the fascist Iron Guard and may have been the real power behind the throne during the dictatorship of King Carol II. He survived several assassination attempts but was finally killed by members of the Iron Guard with German assistance.

The Holocaust saw the systematic mass murder of Jews in the Reichskommissariat Ukraine, the General Government, the Crimean General Government and some areas which were located to the east of Reichskommissariat Ukraine (all of those areas were under the military control of Nazi Germany), in the Transnistria Governorate and Bessarabia, Northern Bukovina and the Hertsa region (all of those areas were then part of Romania, with the latter three areas being re-annexed) and Carpathian Ruthenia (then part of Hungary) during World War II. The listed areas are currently parts of Ukraine (except modern-day Transnistria). Between 1941 and 1945, between 850,000 and 1,600,000 Jews were killed in Ukraine, which included assistance of local collaborators. Another estimate of this figure from Yitzhak Arad is 1,452,000 to 1,518,000 total murdered Ukrainian Jews in the Holocaust. If one looks only at the territories that were a part of the Ukrainian SSR in 1938 (so, excluding Eastern Galicia, Volhynia, northern Bukovina, the Bujak, and Subcarpathian Ruthenia), then between 667,000 and 693,000 Ukrainian Jews were murdered in the Holocaust, also according to Yizhak Arad's data. According to University of Toronto historian Timothy D. Snyder, "the Holocaust is integrally and organically connected to the Vernichtungskrieg, the war in 1941, and it is organically and integrally connected to the attempt to conquer Ukraine … Had Hitler not had the colonial idea to fight a war in Eastern Europe to control Ukraine, had there not been that idea, there could not have been a Holocaust." According to Wendy Lower, the genocide of the Ukrainian Jews was closely linked to German plans to exploit and colonize Ukraine.

Dunaivtsi is a city in Kamianets-Podilskyi Raion, Khmelnytskyi Oblast, Ukraine. It is located on the river Ternavka, 22 km away from the railway station Dunaivtsi and 68 km from the Khmelnytskyi. Reinforcement plant, repair and engineering works and butter-processing plant are located in the city. The city also houses a control center of the State Space Agency of Ukraine. Dunaivtsi hosts the administration of Dunaivtsi urban hromada, one of the hromadas of Ukraine. Current population is 15,078 (2024).

The Holocaust saw the ghettoization, robbery, deportation and mass murder of Jews in occupied Poland by Nazi Germany. Over three million Polish Jews were murdered, primarily at the Chełmno, Belzec, Sobibor, Treblinka and Auschwitz extermination camps, who made up half of the Jewish Holocaust victims. During Nazi occupation, the country lost 20% of its population, or six million people, including three million Jews (90% of the country's Jewish population). In 1939, Nazi Germany invaded Poland while the Soviet Union invaded Poland from the east. In German-occupied Poland, Jews were killed, subjected to forced labor, and forced to move to ghettos. Some 7,000 Jews were killed in 1939, but open mass killings subsided until June of 1941. The Soviet Union deported many Jews to the Soviet interior, where most survived the war. In 1941, Germany invaded the Soviet Union and began the systematic murder of Jews. 1.8 million Jews were killed in Operation Reinhard, shot in roundups in ghettos, died during the train journey, or killed by poison gas in the extermination camps. In 1943 and 1944, the remaining labor camps and ghettos were liquidated. Many Jews tried to escape, but surviving in hiding was very difficult due to factors such as the lack of money to pay helpers and the risk of denunciation. Only 1 to 2 percent of Polish Jews in German-occupied territory survived. After the war, survivors faced difficulties in regaining their property and rebuilding their lives. Especially after the Kielce pogrom, many fled to displaced persons camps in Allied-occupied Germany.

The Boeing B-29 Superfortress is a retired American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the USAAF and USAF during World War II and the Korean War. Named in allusion to its predecessor, the Boeing B-17 Flying Fortress, the Superfortress was designed for high-altitude strategic bombing, but also excelled in low-altitude night incendiary bombing and in dropping naval mines to blockade Japan. Silverplate B-29s dropped the atomic bombs on Hiroshima and Nagasaki, and remain the only system to deliver nuclear weapons in combat.

No Kum-sok (Korean: 노금석; January 10, 1932 – December 26, 2022) was a North Korean–born American engineer and aviator who served as a senior lieutenant in the Korean People's Army Air and Anti-Air Force during the Korean War. Under colonial rule, No was required to adopt a Japanese name, Okamura Kiyoshi. Approximately two months after the end of hostilities, he defected to South Korea in a MiG-15 aircraft, and was subsequently granted political asylum in the United States. He then adopted the English name Kenneth H. Rowe.

Pamir was a four-masted barque built for the German shipping company F. Laeisz. One of their famous Flying P-Liners, named after the Pamir Mountains, she was the last commercial sailing ship to round Cape Horn, in 1949. By 1957, she had been outmoded by modern bulk carriers and could not operate at a profit. Her shipping consortium's inability to finance much-needed repairs or to recruit sufficient sail-trained officers caused severe technical difficulties. On 21 September 1957, she was caught in Hurricane Carrie and sank off the Azores, with only six survivors rescued after an extensive search.

Malta, officially the Republic of Malta, is an island country located in the central Mediterranean Sea. It consists of a number of islands, of which Malta and Gozo are the two main ones—south of Italy, east of Tunisia, and north of Libya. Valletta is the country's capital. Malta is the world's tenth-smallest country by area, ninth-most densely populated, and 166th most populated. It consists of a single urban region, because of which it is often described as a city-state. The two official languages are Maltese—recognised as the national language—and English.

The North American Aviation XB-70 Valkyrie is a retired prototype version of the planned B-70 nuclear-armed, deep-penetration supersonic strategic bomber for the United States Air Force Strategic Air Command. Designed by North American Aviation in the late 1950s, the Valkyrie was a large six-engine, delta-winged aircraft able to fly Mach 3+ at an altitude of 70,000 feet (21,000 metres). At these speeds, it was expected that the B-70 would be practically immune to interceptor aircraft, the only effective weapon against bomber aircraft at the time. The bomber would spend only a brief time over a particular radar station, flying out of its range before the controllers could position their fighters in a suitable location for an interception. Its high speed made the aircraft difficult to see on radar displays and its high-altitude and high-speed capabilities could not be matched by any contemporaneous Soviet interceptor or fighter aircraft. The introduction of the first Soviet surface-to-air missiles in the late 1950s put the idea of the B-70 being near-invulnerable in doubt. In response, the US Air Force (USAF) began flying its missions at low level, where the missile radar's line of sight was limited by terrain. In this low-level penetration role, the B-70 offered little additional performance over the B-52 it was meant to replace, while being far more expensive with shorter range. Alternative missions were proposed, but these were of limited scope. With the advent of intercontinental ballistic missiles (ICBMs) during the late 1950s, crewed nuclear bombers were increasingly seen as obsolete. The USAF eventually gave up fighting for its production and the B-70 program was cancelled in 1961. Development was then turned over to a research program to study the effects of long-duration high-speed flight. As a result, two prototype aircraft, designated XB-70A, were built; these aircraft were used for supersonic test-flights from 1964 to 1969. In 1966, the second, more advanced prototype crashed after colliding with an F-104 Starfighter while flying in close formation for a photo shoot; the only remaining Valkyrie bomber is in the National Museum of the United States Air Force near Dayton, Ohio.

The Gambia, officially the Republic of The Gambia, is a country in West Africa. Geographically, the Gambia is the smallest country in continental Africa; it is bounded by Senegal on all sides except for the western part, which is bordered by the Atlantic Ocean.

Mexicana de Aviación Flight 801 was a scheduled international flight from Chicago-O'Hare International Airport in Illinois bound for Mexico City International Airport, Mexico City. On September 21, 1969, the Boeing 727-100 crashed during its final approach to Mexico City International Airport. The aircraft broke apart upon impact, killing 27 of the 118 occupants on board. The cause of the crash was never determined.

Bahrain, officially the Kingdom of Bahrain, is an island country in the eastern part of Arabian Peninsula in West Asia. Situated near the western shore of the Persian Gulf, the country comprises a small archipelago of 33 natural islands and an additional 50 artificial islands, centred on Bahrain Island, which makes up around 80 percent of the country's landmass. Bahrain is situated between Qatar and the northeastern coast of Saudi Arabia, to which it is connected by the King Fahd Causeway. The population is 1,588,670 as of 2024, of whom 739,736 are Bahraini nationals, and 848,934 are expatriates. Bahrain spans some 760 square kilometres (290 sq mi) and is the third-smallest nation in Asia after Maldives and Singapore. The capital and largest city is Manama.

Ferdinand Emmanuel Edralin Marcos Sr. was a Filipino lawyer and politician who served as the tenth president of the Philippines from 1965 to 1986. From 1972 to 1981, Marcos ruled the Philippines under martial law, embracing a policy of "constitutional authoritarianism." Following the lifting of martial law in 1981, a wide-ranging economic crisis, and the assassination of Ninoy Aquino, Marcos was deposed in 1986 by the People Power Revolution and was succeeded as president by Aquino's widow, Corazon Aquino. He was also the father of Bongbong Marcos, the incumbent president of the Philippines since 2022.

Marcos Orlando Letelier del Solar was a Chilean economist, lawyer, and diplomat who served in the cabinet of President Salvador Allende. A member of the Socialist Party of Chile, Letelier was Chile's ambassador to the United States and later, in rapid succession, foreign minister, interior minister, and defense minister during the final months of Allende's Popular Unity government. After the 1973 Chilean coup d'état, he was arrested, tortured, and held for a year in military prison camps before being stripped of his citizenship and forced into exile.

Seychelles, officially the Republic of Seychelles, is an archipelagic country consisting of 115 islands in the Indian Ocean. Its capital and largest city, Victoria, is 1,500 kilometres east of mainland Africa. Nearby island countries and territories include the Maldives, Comoros, Madagascar, Mauritius, and the French overseas departments of Mayotte and Réunion to the south; and the Chagos Archipelago to the east. Seychelles is the smallest country in Africa as well as the least populated sovereign African country, with an estimated population of 100,600 in 2022.

Malév Flight 203 was an international passenger flight from Istanbul, Turkey to Budapest, Hungarian PR with a stop at Bucharest, SR Romania. On September 21, 1977, the plane clipped some trees and crashed while approaching Bucharest Airport, killing 29 of the 53 on board.

Belize is a country on the north-eastern coast of Central America. It is bordered by Mexico to the north, the Caribbean Sea to the east, and Guatemala to the west and south. It also shares a maritime boundary with Honduras to the southeast. Part of the Caribbean region, Belize is a member of the Caribbean Community (CARICOM) and the Commonwealth Caribbean, the historical British West Indies.

Sandra Day O'Connor was an American attorney, politician, and jurist who served as an associate justice of the Supreme Court of the United States from 1981 to 2006. Nominated by President Ronald Reagan, O'Connor was the first woman to serve as a U.S. Supreme Court justice. A moderate conservative, she was considered a swing vote. Before O'Connor's tenure on the Court, she was an Arizona state judge and earlier an elected legislator in Arizona, serving as the first female majority leader of a state senate as the Republican leader in the Arizona Senate. Upon her nomination to the Court, O'Connor was confirmed unanimously by the United States Senate.

Brunei, officially Brunei Darussalam, is a country in Southeast Asia, situated on the northern coast of the island of Borneo. Apart from its coastline on the South China Sea, it is completely surrounded by the Malaysian state of Sarawak, with its territory bifurcated by the Sarawak district of Limbang. Brunei is the only sovereign state entirely on Borneo; the remainder of the island is divided between its multi-landmass neighbours of Malaysia and Indonesia. As of 2025, the country had a population of 466,330, being the least populated country in Asia of whom approximately 64,409 resided in the capital and largest city of Bandar Seri Begawan. Its official language is Malay, and Sunni Islam is the state religion of the country, although other religions are nominally tolerated. The government of Brunei is an absolute monarchy ruled by the Sultan, and it implements a fusion of English common law and jurisprudence inspired by Islam, including sharia.

Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia to the north, Azerbaijan to the east, and Iran and the Azerbaijani exclave of Nakhchivan to the south. Yerevan is the capital, largest city and financial center.

Boris Nikolayevich Yeltsin was a Soviet and Russian politician who served as President of Russia from 1991 to 1999, having previously served as Chairman of the Supreme Soviet of the Russian SFSR from 1990 to 1991. He was a member of the Communist Party of the Soviet Union (CPSU) from 1961 to 1990. He later stood as a political independent, during which time he was viewed as being ideologically aligned with liberalism.

From 20 to 23 September 1993, during the Sukhumi massacre, separatists in Sukhumi, Abkhazia blocked Georgian troops' overland supply routes as part of the war in Abkhazia. In response, the Georgian government used Sukhumi Babushara Airport to ferry supplies to troops stationed in Sukhumi. Abkhaz forces attacked the airport in an attempt to further block the supply routes.

MIAT Mongolian Airlines Flight 557 was a scheduled domestic passenger flight in Mongolia from Ulaanbaatar to Mörön. On 21 September 1995, the Antonov An-24 crashed on approach to Mörön, killing 41 out of the 42 people on board. This incident stands as the deadliest aviation accident in Mongolian history.

The Defense of Marriage Act (DOMA) was a United States federal law passed by the 104th United States Congress and signed into law by President Bill Clinton on September 21, 1996. It banned federal recognition of same-sex marriage by limiting the definition of marriage to the union of one man and one woman, and it further allowed states to refuse to recognize same-sex marriages granted under the laws of other states.

St. Olaf's Church in Tyrvää is a late medieval fieldstone church in Tyrvää, Sastamala, Finland. It is located on the shore of lake Rautavesi. The church was built approximately in 1510–1516 and burnt down by an arsonist on 21 September 1997.

The Chi-Chi earthquake, was a 7.3 ML or 7.7 Mw earthquake which occurred in Jiji (Chi-Chi), Nantou County, Taiwan on September 21, 1999, at 01:47:12 local time. 2,415 people were killed, 11,305 injured, and NT$300 billion worth of damage was done. It is the second-deadliest earthquake in Taiwan's recorded history, after the 1935 Shinchiku-Taichū earthquake.

America: A Tribute to Heroes was a benefit concert created by the heads of the four major American broadcast networks; ABC, CBS, Fox and NBC. Joel Gallen was selected by them to produce and run the show. Actor George Clooney organized celebrities to perform and to staff the telephone bank.

Ross Andrew Parker, from Peterborough, England, was a seventeen-year-old white English male murdered in an unprovoked racially motivated crime. He bled to death after being stabbed, beaten with a hammer and repeatedly kicked by a gang of British Pakistani men. The incident occurred in Millfield, Peterborough, ten days after the September 11 attacks.

Galileo was an American robotic space probe that studied the planet Jupiter and its moons, as well as the asteroids Gaspra and Ida. Named after the Italian astronomer Galileo Galilei, it consisted of an orbiter and an entry probe. It was delivered into Earth orbit on October 18, 1989, by Space Shuttle Atlantis, during STS-34. Galileo arrived at Jupiter on December 7, 1995, after gravitational assist flybys of Venus and Earth, and became the first spacecraft to orbit an outer planet.

Egyptians are an ethnic group native to the Nile Valley in Egypt. Egyptian identity is closely tied to geography. The population is concentrated in the Nile Valley, a small strip of cultivable land stretching from the First Cataract to the Mediterranean and enclosed by desert both to the east and to the west. This unique geography has been the basis of the development of Egyptian society since antiquity.

Harakat al-Shabaab al-Mujahideen simply known as al-Shabaab is a transnational Wahhabi-Salafi Jihadist militant organization. It is involved in the ongoing Somali Civil War, controlling a non-contiguous network of primarily rural areas in southern Somalia that some consider a quasi-state. Since 2011, the group refers to the territory under its control as the Islamic Emirate of Somalia, although it has not formally declared itself as an emirate. Al-Shabaab has invoked takfir to rationalize its terrorist attacks on Somali civilians and civil servants. It is, in a more limited capacity, active elsewhere in East Africa, and has pledged allegiance to the militant organization al-Qaeda. Al-Shabaab has been designated as a terrorist organization by numerous countries, including the United States, the United Kingdom, Australia, and Canada, as well as several EAC and EU member-states. The militant group remains subject to international sanctions imposed by the United Nations Security Council, the European Union, and other jurisdictions.

Adventist Health System Sunbelt Healthcare Corporation is an American hospital network. It is headquartered in Altamonte Springs, Florida. It operates healthcare facilities across multiple states. It is the largest Protestant nonprofit organization in the country and is affiliated with the Seventh-day Adventist Church.

Zacharias "Zak" Kostopoulos was a Greek-American activist, defending the rights of LGBT people, HIV-positive people, sex workers, and refugees. He worked as a drag performer under the stage name Zackie Oh. He was killed on a busy street near Omonoia Square, Athens in broad daylight on 21 September 2018. First beaten by civilians and later by the police, he died while on the way to the hospital. Two men were found guilty of his murder.

On 26 November 2019 at 03:54 CET (UTC+1), northwestern Albania was struck by a magnitude 6.4 earthquake with an epicentre 16 kilometres (9.9 mi) west-southwest of Mamurras. The earthquake lasted at least 50 seconds and was felt in Albania's capital Tirana, and in places as far away as Bari, Taranto and Belgrade, 370 kilometres (230 mi) northeast of the epicentre. The maximum felt intensity was VIII (Severe) on the Modified Mercalli intensity scale. A total of 51 people were killed in the earthquake, with about 3,000 injured. It was the second earthquake to strike the region within three months. It was the strongest earthquake to hit Albania in more than 40 years, its deadliest earthquake in 99 years and the world's deadliest earthquake in 2019.