December 21 in History

AD 69 (LXIX) was a common year starting on Sunday of the Julian calendar. In the Roman Empire, it was known as the Year of the consulship of Galba and Vinius (or, less frequently, year 822 Ab urbe condita). The denomination AD 69 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Pope Honorius II (9 February 1060 – 13 February 1130), born Lamberto Scannabecchi, was head of the Catholic Church and ruler of the Papal States from 21 December 1124 to his death in 1130. Although from a humble background, his obvious intellect and outstanding abilities saw him promoted up through the ecclesiastical hierarchy. Attached to the Frangipani family of Rome, his election as pope was contested by a rival candidate, Celestine II, and force was used to guarantee his election. Honorius's pontificate was concerned with ensuring that the privileges the Roman Catholic Church had obtained through the Concordat of Worms were preserved and, if possible, extended. He was the first pope to confirm the election of the Holy Roman emperor. Distrustful of the traditional Benedictine order, he favoured new monastic orders, such as the Augustinians and the Cistercians, and sought to exercise more control over the larger monastic centres of Monte Cassino and Cluny Abbey. He also approved the new military order of the Knights Templar in 1128. Honorius II failed to prevent Roger II of Sicily from extending his power in southern Italy and was unable to stop Louis VI of France from interfering in the affairs of the French church. Like his predecessors, he managed the wide-ranging affairs of the church through Papal Legates. With his death in 1130, the Church was again thrown into confusion with the election of two rival popes, Innocent II and the antipope Anacletus II.

The siege of Weinsberg took place in 1140 in Weinsberg, in the modern state of Baden-Württemberg, Germany, which was then part of the Holy Roman Empire. The siege was a decisive battle between two dynasties, the Welfs and the Hohenstaufen. The Welfs for the first time changed their war cry from "Kyrie Eleison" to their party cries. The Hohenstaufen used the 'Strike for Gibbelins' war cry. On the death of the Holy Roman Emperor Lothair III (or II) in 1137, Henry the Proud was the Welf heir of the patrimony of his deceased father-in-law, and possessor of the crown jewels. He stood as a candidate for emperor, but the local princes opposed him and elected Conrad III, a Hohenstaufen, in Frankfurt on 2 February 1138. When Conrad gave the Duchy of Saxony to Count Albert the Bear, the Saxons rose in defence of their young prince, and Count Welf of Altorf, the brother of Henry the Proud, began the war. Exasperated at the heroic defence of Welfs, Conrad III had resolved to destroy Weinsberg and imprison its defenders. However he suspended the final assault after a surrender was negotiated.

Ryazan is the largest city and the administrative center of Ryazan Oblast, Russia. The city is located on the banks of the Oka River in Central Russia, 196 km (122 mi) southeast of Moscow. As of the 2010 Census, Ryazan had a population of 524,927, making it the 33rd most populated city in Russia, and the fourth most populated in Central Russia after Moscow, Voronezh, and Yaroslavl.

The Battle of Linuesa was an action fought on 21 December 1361 in the city of Huesa, Kingdom of Jaén (present-day Province of Jaén, Spain). The battle was fought between the Kingdom of Castile and the forces of the Emirate of Granada. The battle resulted in a victory for the forces of the Kingdom of Castile. The Castilian forces were commanded by Diego García de Padilla, the Grand Master of the Order of Calatrava, Enrique Enríquez "el Mozo", the Adelantado Mayor of the frontera de Andalucía, and by Men Rodríguez de Biedma, the head Caudillo of the Bishop of Jaén.

Plymouth Colony (sometimes spelled Plimouth) was the first permanent English colony in New England, founded in 1620, and the third permanent English colony in America, after Newfoundland and the Jamestown Colony. It was settled by the passengers on the Mayflower at a location that had previously been surveyed and named by Captain John Smith. The settlement served as the capital of the colony and developed as the town of Plymouth, Massachusetts. At its height, Plymouth Colony occupied most of what is now the southeastern portion of Massachusetts; it was approximately coterminous with the combined territories of Plymouth, Barnstable, and Bristol Counties, all of which were originally established by the General Court of the Plymouth Colony. Many of the people and events surrounding Plymouth Colony have become part of American folklore, including the American tradition of Thanksgiving and the monument of Plymouth Rock. Plymouth Colony was founded by a group of Protestant Separatists initially known as the Brownist Emigration, who came to be known as the Pilgrims. The colony established a treaty with Wampanoag chief Massasoit which helped to ensure its success; in this, they were aided by Squanto, a member of the Patuxet tribe. Plymouth played a central role in King Philip's War (1675–1678), one of several Indian Wars. The colony was ultimately merged with the Massachusetts Bay Colony and other territories in 1691 to form the Province of Massachusetts Bay. Despite the colony's relatively short independent existence, Plymouth holds a special role in American history. The social and legal systems of the colony became closely tied to their religious beliefs, as well as to English custom.

Nacogdoches is a city in East Texas and the county seat of Nacogdoches County, Texas, United States. As of the 2020 census, Nacogdoches had a population of 32,147. Stephen F. Austin State University is located in Nacogdoches and specializes in forestry and agriculture. Nacogdoches is also known as "The Oldest Town in Texas". Its sister city is Natchitoches, Louisiana.

The First Egyptian–Ottoman War or First Syrian War (1831–1833) was a military conflict between the Ottoman Empire and Egypt brought about by Muhammad Ali Pasha's demand to the Sublime Porte for control of Greater Syria, as reward for aiding the Sultan during the Greek War of Independence. As a result, Egyptian forces temporarily gained control of Syria, advancing as far north as Kütahya.

The Medal of Honor (MOH) is the highest military decoration of the United States Armed Forces and is awarded to recognize American soldiers, sailors, marines, airmen, guardians, and coast guardsmen who have distinguished themselves by acts of valor. The medal is normally awarded by the president of the United States (the commander in chief of the armed forces) and is presented "in the name of Congress." According to the Congressional Medal of Honor Society, Congressional Medal of Honor (CMOH) "is sometimes mistakenly used because the Medal was created by Congress," though the official name of the award is simply "Medal of Honor". There are three distinct variants of the medal: one for the Department of the Army, awarded to soldiers; one for branches of the Department of the Navy, awarded to sailors, marines, and coast guardsmen; and one for military branches of the Department of the Air Force, awarded to airmen and guardians. The Medal of Honor was introduced for the Naval Service in 1861, soon followed by the Army's version in 1862. The Air Force used the Army's version until they received their own distinctive version in 1965. The Medal of Honor is the oldest continuously issued combat decoration of the United States Armed Forces. The president typically presents the Medal of Honor at a formal ceremony intended to represent the gratitude of the American people, with posthumous presentations made to the primary next of kin. There have been 3,552 Medals of Honor awarded, with over 40 percent awarded for actions during the American Civil War. A total of 911 Army medals were revoked after Congress authorized a review in 1917, and a number of Navy medals were also revoked before the turn of the century—none of these are included in this total except for those that were subsequently restored. In 1990, Congress designated March 25 as Medal of Honor Day.

The Challenger expedition of 1872–1876 was a scientific programme that made many discoveries to lay the foundation of oceanography. The expedition was named after the naval vessel that undertook the trip, HMS Challenger. The expedition, initiated by William Benjamin Carpenter, was placed under the scientific supervision of Sir Charles Wyville Thomson—of the University of Edinburgh and Merchiston Castle School—assisted by five other scientists, including Sir John Murray, a secretary-artist and a photographer. The Royal Society of London obtained the use of Challenger from the Royal Navy and in 1872 modified the ship for scientific tasks at Sheerness, equipping it with separate laboratories for natural history and chemistry. The expedition, led by Captain George Nares, sailed from Portsmouth, England, on 21 December 1872. Other naval officers included Commander John Maclear. Under the scientific supervision of Thomson himself, the ship travelled approximately 68,890 nautical miles (79,280 miles; 127,580 kilometres) surveying and exploring. The result was the Report of the Scientific Results of the Exploring Voyage of H.M.S. Challenger during the years 1873–76 which, among many other discoveries, catalogued over 4,000 previously unknown species. John Murray, who supervised the publication, described the report as "the greatest advance in the knowledge of our planet since the celebrated discoveries of the fifteenth and sixteenth centuries". Challenger sailed close to Antarctica, but not within sight of it. However, it was the first scientific expedition to take pictures of icebergs. The expedition, which circumnavigated the Earth, collected data by lowering sounding lines to the bottom of the ocean floor to measure its depth and collect sediment samples, by collecting marine organisms by means of dredges lowered to the ocean floor and trawls lowered into the water at different depths, by measuring temperature at various depths and by collecting samples of seawater at standard depths for chemical analysis. They collected plankton samples and recorded the speed and direction of ocean surface currents. Samples were preserved in brine or alcohol, or dried, then brought to Europe and distributed to various experts to analyse.

Nora Helmer is a fictional character in Henrik Ibsen's 1879 play A Doll's House. She is introduced as a seemingly devoted wife and mother, living in a comfortable middle-class home with her husband Torvald, a recently promoted bank manager, and their three children. After committing forgery to pay for her husband's medical treatment without his knowledge, Nora attempts to deal with the consequences that threaten her marriage. Nora is based on Laura Kieler, a Norwegian journalist and close friend of Ibsen's, who also allegedly committed forgery in order to finance a trip to Italy. Nora's character sparked significant controversy upon the play's release, particularly due to her decision to abandon her domestic life, which challenged 19th-century gender norms. Over time, she has been reinterpreted as a feminist icon and a heroine symbolizing women's struggle for autonomy and self-determination. Her characterization inspired literary and political discussions worldwide, influencing debates on gender roles, marriage, and individual freedom, particularly in early feminist movements and 20th-century Chinese intellectual discourse.

The Royal Canadian Dragoons (RCD) is the senior armoured regiment of the Canadian Army by precedence. It is one of three armoured regiments in the Regular Force and forms part of the Royal Canadian Armoured Corps. The colonel-in-chief of the RCD is Charles III, King of Canada. The colonel of the regiment is Major-General (Retired) Stephen Cadden, CD. The commanding officer is Lieutenant-Colonel C. Summerfield, and the regimental sergeant major is Chief Warrant Officer J. Nickerson. The regiment is composed of Regimental Headquarters, "A", "B", "C", "D" and Headquarters Squadrons. "A", "B" and "D" Squadrons, based at CFB Petawawa, are light cavalry squadrons. "C" Squadron is based at CFB Gagetown, and the squadron consists of both Dragoons and members of 12e Régiment blindé du Canada. Headquarters Squadron, based in Petawawa, provides first-line combat service support to the regiment.

The Chilean Army is the land arm of the Chilean Armed Forces. This 80,000-person army is organized into six divisions, an army aviation brigade and a special operations brigade.

The Pretoria Pit disaster was a mining accident on 21 December 1910, when an underground explosion occurred at the Hulton Colliery Bank Pit No. 3, known as the Pretoria Pit, in Over Hulton, Westhoughton, then in the historic county of Lancashire, in North West England. A total of 344 men and boys lost their lives.

Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China to the north, and India to the south, east, and west, while it is narrowly separated from Bangladesh by the Siliguri Corridor, and from Bhutan by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten highest mountains, including Mount Everest, the highest point above mean sea level on Earth. Kathmandu is the nation's capital and its largest city. Nepal is a multi-ethnic, multi-lingual, multi-religious, and multi-cultural sovereign state, with Nepali as the official language.

Sergei Prokofiev's Lieutenant Kijé (Russian: Поручик Киже, Poruchik Kizhe) music was originally written to accompany the film of the same name, produced by the Belgoskino film studios in Leningrad in 1933–34 and released in March 1934. It was Prokofiev's first attempt at film music, and his first commission. In the early days of sound cinema, among the various distinguished composers ready to try their hand at film music, Prokofiev was not an obvious choice for the commission. Based in Paris for almost a decade, he had a reputation for experimentation and dissonance, characteristics at odds with the cultural norms of the Soviet Union. By early 1933, however, Prokofiev was anxious to return to his homeland, and saw the film commission as an opportunity to write music in a more popular and accessible style. After the film's successful release, the five-movement Kijé suite was first performed in December 1934, and quickly became part of the international concert repertoire. It has remained one of the composer's best-known and most frequently recorded works. Elements of the suite's score have been used in several later films, and in two popular songs of the Cold War era.

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, with many engaging in total war on an unprecedented scale. World War II was the deadliest conflict in history, causing the deaths of 60 to 75 million people, a majority of whom were civilians. 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 International Convention on the Elimination of All Forms of Racial Discrimination (ICERD) is a United Nations convention. A third-generation human rights instrument, the Convention commits its members to the elimination of racial discrimination and the promotion of understanding among all races. The convention also requires its parties to criminalize hate speech and criminalize membership in racist organizations. The convention also includes an individual complaints mechanism, effectively making it enforceable against its parties. This has led to the development of a limited jurisprudence on the interpretation and implementation of the convention. The convention was adopted and opened for signature by the United Nations General Assembly on 21 December 1965, and entered into force on 4 January 1969. As of July 2020, it has 88 countries as signatories and 182 countries as parties (including accessions and successions). The convention is monitored by the Committee on the Elimination of Racial Discrimination (CERD).

The Lancaster House Agreement is an agreement signed on 21 December 1979 in Lancaster House, following the conclusion of a constitutional conference where different parties discussed the future of Zimbabwe Rhodesia, formerly known as Rhodesia. The agreement effectively concluded the Rhodesian Bush War. It also marked the nullification of Rhodesia's Unilateral Declaration of Independence, as British colonial authority was to be restored for a transitional period to internationally recognised independence, during which free elections under supervision by the British government would take place. Crucially, ZANU and ZAPU, the political wings of ZANLA and ZIPRA (who had been waging an escalating insurgency since 1964), would be permitted to stand candidates in the forthcoming elections. This was however conditional to compliance with the ceasefire and the verified absence of voter intimidation.

Pan Am Flight 103 was a regularly scheduled Pan Am flight from Frankfurt to Detroit, with stopovers in London and New York City. Shortly after 19:00 GMT on 21 December 1988, the Boeing 747 Clipper Maid of the Seas was destroyed by a bomb while flying over the Scottish town of Lockerbie. The attack killed 270 people: all 243 passengers, the 16 crew members, and 11 residents of Lockerbie who were killed by fire and falling debris. The Lockerbie Bombing is the deadliest terrorist attack in the history of the United Kingdom and one of the deadliest terrorist attacks in European history. In 1991, after a three-year joint investigation between Dumfries and Galloway Constabulary, supported by Strathclyde Police, the London Metropolitan Police, and the US Federal Bureau of Investigation (FBI), arrest warrants were issued for two Libyan Mukhabarat el-Jamahiriya officers. In 1999, after repeated negotiations and United Nations sanctions, Libyan leader Muammar Gaddafi allowed extradition of the two men for trial at Camp Zeist, the Netherlands. In 2001, Abdelbaset al-Megrahi was found guilty of 270 counts of murder in connection with the bombing, and was sentenced to life imprisonment. His co-accused, Lamin Khalifah Fhimah, was acquitted. In 2009, Megrahi was released by the Scottish Government on compassionate grounds after being diagnosed with prostate cancer. Megrahi died in 2012 and remains the only person convicted of the bombing, while Fhimah died in August 2026. In 2003, Gaddafi paid more than US$2 billion in compensation to the families of the victims of the Lockerbie bombing. Although Gaddafi maintained he never personally ordered the attack, acceptance of Megrahi's status as a government employee was used to connect responsibility by Libya with a series of requirements laid out by a UN resolution for sanctions against Libya to be lifted. In 2011, during the First Libyan Civil War, former Minister of Justice Mustafa Abdul Jalil said Gaddafi personally ordered the bombing. The complexity of the operation required the involvement of several accomplices, several of whom were identified but never apprehended. The lack of convictions has given rise to conspiracy theories and truth campaigns led by relatives of the victims. Jim Swire, whose daughter Flora was killed in the attack, believes the bomb was loaded at Heathrow Airport, and was not sent via feeder flights from Malta, as the US and UK investigators determined. In 2020, US authorities indicted Tunisian resident and Libyan national Abu Agila Masud, who was 37 years old at the time of the incident, for participating in the bombing. In 2022, Masud was taken into custody, and pleaded not guilty in 2023. A federal trial was scheduled for 2026, but was delayed again days before it was due to begin in August 2026 due to newly discovered evidence. Pan Am 103 was the second Boeing 747 destroyed by a mid-air bombing, after Air India 182 in June 1985; while the Pan Am flight was a 747-100, the Air India flight was a 747-200. A previous 747, Pan Am Flight 93, was blown up on the ground in 1970 during the Dawson's Field hijackings, the first hull loss of a 747.

On 26 December 1991, the Soviet Union was formally dissolved and ceased to exist as a sovereign state and subject of international law. It also brought an end to the Soviet Union's federal government and to Soviet leader Mikhail Gorbachev's efforts to reform the Soviet political and economic system in an attempt to stop a period of political and economic stagnation. The collapse of the Soviet Union in 1991 resulted from several factors: chronic economic stagnation, the unsustainable financial burden of the arms race with the United States and foreign conflicts, intense ethnic nationalism and separatism within its union republics, and the destabilizing effects of Gorbachev's reforms (particularly glasnost and perestroika). The process began with growing unrest in the country's union republics developing into an incessant political and legislative conflict between them and the central government. Until its final years, the Soviet Union was made up of 15 union republics that served as the homelands of different ethnic groups. Estonia was the first union republic to declare state sovereignty on 16 November 1988. Lithuania was the first republic to declare independence, in March 1990. During the failed 1991 August coup, communist hardliners attempted to overthrow Gorbachev and reverse his reforms. However, the turmoil caused the central government in Moscow to lose influence, ultimately leading many republics to declare unwanted independence in the following days and months. On 8 December 1991, the leaders of its three founding republics—the Russian SFSR, the Byelorussian SSR, and the Ukrainian SSR—signed the Belovezha Accords and declared that the Soviet Union no longer existed. Eight more republics joined the declaration shortly thereafter. The Belovezha Accords also established the Commonwealth of Independent States (CIS) to replace the Soviet Union as a community. Kazakhstan was the last republic to declare independence, on 16 December. All post-Soviet states, with the exception of Georgia and the Baltic states, joined the CIS on 21 December by signing the Alma-Ata Protocol. Russia, as by far the largest and most populous republic, became the Soviet Union's recognized successor state. On 25 December 1991, Gorbachev resigned and transferred his presidential powers—including control of the nuclear launch codes—to Russian president Boris Yeltsin. That evening, the Soviet flag was lowered from the Moscow Kremlin for the last time and replaced with the Russian tricolor. The following day, the Soviet of the Republics, the upper chamber of the Supreme Soviet of the Soviet Union, formally dissolved the Soviet Union by adopting Declaration No. 142-N. The dissolution marked the culmination of the Revolutions of 1989 and the end of the Cold War. In the aftermath of the Cold War, several of the post-Soviet states have retained close links with Russia and formed multilateral organizations such as the CIS and the Collective Security Treaty Organization (CSTO). A few, notably the Baltic states, moved out of the Russian sphere of influence and towards the West.

The Netherlands, also informally known as Holland, is a country in Northwestern Europe, with overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Netherlands. The Netherlands consists of twelve provinces and three overseas special municipalities. European Netherlands has land borders with Germany to the east and with Belgium to the south, and a coastline to the north and west. It shares maritime borders with the United Kingdom, Germany, and Belgium in the North Sea. The official language is Dutch, with West Frisian as a secondary official language in the province of Friesland. Dutch, English, and Papiamento are official in the Caribbean territories. People from the Netherlands are referred to as Dutch.

Bethlehem is a city in the West Bank, Palestine, located about ten kilometres south of Jerusalem, and the capital of the Bethlehem Governorate. It had a population of 28,591 people, as of 2017. The city's economy is strongly linked to tourism, especially during the Christmas period, when Christians embark on a pilgrimage to the Church of the Nativity, which is revered as the location of the birth of Jesus.

The Civil Guard is one of the two national law enforcement agencies of Spain. As a national gendarmerie, it is military in nature and is responsible for civil policing under the authority of both the Ministry of the Interior and the Ministry of Defence. The role of the Ministry of Defence is limited except in times of war, when the Ministry has exclusive authority. The corps is colloquially known as the benemérita. In annual surveys, it generally ranks as the national institution most valued by Spaniards, closely followed by other law enforcement agencies and the armed forces.

Cubana de Aviación Flight 1216 was a McDonnell Douglas DC-10 that overran the runway at La Aurora International Airport, Guatemala City, on 21 December 1999. 8 passengers and 8 crew members on board were killed as well as 2 people on the ground.

The Iraq War, also referred to as the Second Gulf War, was a protracted armed conflict in Iraq from 2003 to 2011. It began with the invasion by a United States–led coalition, which resulted in the overthrow of the Ba'athist government of Saddam Hussein. During the US occupation of Iraq, the conflict persisted as an insurgency that arose against coalition forces and the newly established Iraqi government. US forces were officially withdrawn in 2011. In 2014, the US became re-engaged in Iraq, leading a new coalition under Combined Joint Task Force – Operation Inherent Resolve, as the conflict evolved into the ongoing Islamic State insurgency.

The 2012 phenomenon was a range of eschatological beliefs that cataclysmic or transformative events would occur on or around 21 December 2012. This date was regarded as the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count calendar, and festivities took place on 21 December 2012 to commemorate the event in the countries that were part of the Maya civilization, with main events at Chichén Itzá in Mexico and Tikal in Guatemala.

A great conjunction is a conjunction of the planets Jupiter and Saturn, when the two planets appear closest together in the sky. Great conjunctions occur approximately every 20 years when Jupiter "overtakes" Saturn in its orbit. They are named "great" for being by far the rarest of the conjunctions between naked-eye planets.

On 21 December 2023, a mass shooting occurred at Charles University's Faculty of Arts main building in central Prague, Czech Republic. A lone gunman, 24-year-old postgraduate student David Kozák, killed 13 people and injured 25 others before committing suicide after exchanging gunfire with police; an additional victim died indirectly from falling to her death while trying to escape the perpetrator.