August 21 in History

Eraclus, alternatively Eraclius or Evraclus, was the 25th bishop of Liège (959–971).

The Song dynasty was an imperial dynasty of China that ruled from 960 to 1279. The dynasty was founded by Emperor Taizu of Song, who usurped the throne of the Later Zhou dynasty and went on to conquer the rest of the Ten Kingdoms, ending the Five Dynasties and Ten Kingdoms period. The Song often came into conflict with the contemporaneous Liao, Western Xia, and Jin dynasties in northern China. After retreating to southern China following attacks by the Jin dynasty, the Song was eventually conquered by the Mongol-led Yuan dynasty.

Minamoto no Yoritomo (源 頼朝; Japanese pronunciation: [mʲi.na.mo.to no (|) jo.ɾʲi.to.mo], May 9, 1147 – February 9, 1199) was a samurai, daimyo and the founder and the first shogun of the Kamakura shogunate, ruling from 1192 until 1199, also the first shogun in the history of Japan to hold de-facto power over Japan. He was married to Hōjō Masako, who acted as regent (shikken) after his death. Yoritomo was the son of Minamoto no Yoshitomo and belonged to Seiwa Genji's prestigious Kawachi Genji family. After successfully maneuvering himself to the position of rightful heir of the Minamoto clan, he led his clan against the Taira from his capital in Kamakura, beginning the Genpei War in 1180. After five years of civil war, the Minamoto clan finally defeated the Taira in the Battle of Dan-no-ura in 1185. Yoritomo established the supremacy of the samurai caste and the first shogunate (bakufu) which was to be centered around Kamakura, thus beginning the feudal age in Japan, which lasted until the 19th century.

Stefan Uroš III (c. 1276 – 11 November 1331), was King of Serbia from 6 January 1322 to 8 September 1331. Dečanski was the son of King Stefan Milutin (d. 1321). He defeated two other contenders to the Serbian throne. Stefan is known as Dečanski after the great monastery of Visoki Dečani he built.

Prince Henry the Navigator (4 March 1394 – 13 November 1460), was a Portuguese prince, a central figure in the early days of the Portuguese Empire and often credited as one of the main initiators of the Age of Discovery. Henry was the third child of King John I of Portugal, who founded the House of Aviz. Utilising the new caravel ship, Henry directed the early development of Portuguese exploration and maritime trade with other continents through the systematic exploration of Western Africa, the islands of the Atlantic Ocean, and the search for new routes. He supported his father in the 1415 conquest of Ceuta, a Muslim port on the North African coast across the Straits of Gibraltar from the Iberian Peninsula. Regarded as the patron of Portuguese discoveries, he died on 13 November 1460 in Vila do Bispo in the Algarve.

Prince Rupert of the Rhine, Duke of Cumberland was an English–German army officer, admiral, scientist, and colonial governor. He first rose to prominence as a Royalist cavalry commander during the English Civil War. Rupert was the third son of the German Prince Frederick V of the Palatinate and Elizabeth, eldest daughter of King James VI and I of Scotland and England respectively.

The Pueblo peoples, sometimes referred to as Puebloans, are Native Americans in the Southwestern United States who share common agricultural, material, and religious practices. Among the currently inhabited pueblos, Taos, San Ildefonso, Acoma, Zuni, and Hopi are some of the most commonly known. Pueblo people speak languages from four different language families, and each pueblo is further divided culturally by kinship systems and agricultural practices, although all cultivate varieties of corn (maize).

The Battle of Dunkeld (Scottish Gaelic: Blàr Dhùn Chaillinn) was fought between Jacobite clans supporting the deposed king James VII of Scotland and a regiment of covenanters supporting William of Orange, in the streets around Dunkeld Cathedral, Dunkeld, Scotland, on 21 August 1689 and formed part of the Jacobite rising of 1689, commonly called Dundee's rising in Scotland. The battlefield was added to the Inventory of Historic Battlefields in Scotland in 2012.

The Seventh Ottoman–Venetian War was fought between the Republic of Venice and the Ottoman Empire between 1714 and 1718. It was the last conflict between the two powers, and ended with an Ottoman victory and the loss of Venice's major possession in the Greek peninsula, the Peloponnese (Morea). Where the Barbary States intervention to support the Ottomans. Venice was saved from a greater defeat by the intervention of Austria in 1716 and by some naval success. The war ended with Treaty of Passarowitz in 1718.

Gustav III (24 January [O.S. 13 January] 1746 – 29 March 1792), also called Gustavus III, was King of Sweden from 1771 until his assassination in 1792. He was the eldest son of King Adolf Frederick and Queen Louisa Ulrika of Sweden. Gustav was a vocal opponent of what he saw as the abuse of political privileges seized by the nobility since the death of King Charles XII in the Great Northern War. Seizing power from the government in a coup d'état, called the Swedish Revolution, in 1772 that ended the Age of Liberty, he initiated a campaign to restore a measure of royal autocracy. This was completed by the Union and Security Act of 1789, which swept away most of the powers exercised by the Swedish Riksdag of the Estates during the Age of Liberty, but at the same time, it opened up the government for all citizens, thereby breaking the privileges of the nobility. A believer in enlightened absolutism, Gustav spent considerable public funds on cultural ventures, which were controversial among his critics, as well as military attempts to seize Norway with Russian aid, then a series of attempts to re-capture the Swedish Baltic dominions lost during the Great Northern War through the failed war with Russia. Nonetheless, his successful leadership in the Battle of Svensksund averted a complete military defeat and signified that Swedish military might was to be countenanced after its major defeats earlier in the century. An admirer of Voltaire, Gustav legalised Catholic and Jewish presence in Sweden, and enacted wide-ranging reforms aimed at economic liberalism, social reform and the restriction, in many cases, of torture and capital punishment. The much-praised Freedom of the Press Act of 1766 was severely curtailed, however, by amendments in 1774 and 1792, effectively extinguishing independent media. Following the uprising against the French monarchy in 1789, Gustav pursued an alliance of princes aimed at crushing the insurrection and re-instating his French counterpart, King Louis XVI, offering Swedish military assistance as well as his leadership. In 1792, he was mortally wounded by a gunshot in the lower back during a masquerade ball as part of an aristocratic-parliamentary coup attempt, but managed to assume command and quell the uprising before succumbing to sepsis 13 days later, a period during which he received apologies from many of his political enemies. Gustav's immense powers were placed in the hands of a regency under his brother Prince Carl and Gustaf Adolf Reuterholm until his son and successor Gustav IV Adolf reached adulthood in 1796. The Gustavian autocracy thus survived until 1809, when his son was ousted in another coup d'état, which definitively established parliament as the dominant political power; this has lasted until the modern day, where the Riksdag is Sweden's supreme legislature. A patron of the arts and benefactor of arts and literature, Gustav founded the Swedish Academy, created a national costume and had the Royal Swedish Opera and Royal Dramatic Theatre built. In 1772, he founded the Royal Order of Vasa to acknowledge and reward those Swedes who had contributed to advances in the fields of agriculture, mining and commerce. He was also a patron of many cultural figures, including Alexander Roslin and Carl Michael Bellman, and is often considered one of the most important figures in the history of Swedish art, music and architecture. Gustav III was well liked by the Swedish population and was mourned upon his death. In 1777, Gustav III was the first formally neutral head of state in the world to recognise the United States during its war for independence from Great Britain. Swedish military forces were engaged by the thousands on the side of the colonists, largely through the French expedition force. Through the acquisition of Saint Barthélemy in 1784, Gustav enabled the restoration, if symbolic, of Swedish overseas colonies in America, as well as great personal profits from the transatlantic slave trade.

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 Crown 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 Colonial Empire during the Seven Years' War, tensions and disputes began escalating between the British and their 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 Thirteen Colonies, the British Parliament had imposed the Intolerable Acts, an attempt to disarm British-American colonists, 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, king 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 1776. 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). American Indian 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 British American colonists 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.

In the Battle of Vimeiro (sometimes shown as "Vimiera" or "Vimeira" in contemporary British texts) on 21 August 1808, the British under General Arthur Wellesley (who later became the Duke of Wellington) defeated the French under Major-General Jean-Andoche Junot near the village of Vimeiro (Portuguese pronunciation: [viˈmɐjɾu]), near Lisbon, Portugal, during the Peninsular War. This battle put an end to the first French invasion of Portugal. Four days after the Battle of Roliça, Wellesley's army was attacked by a French army under General Junot near the village of Vimeiro. The battle began as a battle of manoeuvre, with French troops attempting to outflank the British left, but Wellesley was able to redeploy his army to face the assault. Meanwhile, Junot sent in two central columns but these were forced back by sustained volleys from troops in line. Soon afterwards, the flanking attack was beaten off and Junot retreated towards Torres Vedras, having lost 2,000 men and 13 cannon, compared to 700 Anglo-Portuguese losses. No pursuit was attempted because Wellesley was superseded by Sir Harry Burrard and then Sir Hew Dalrymple (one having arrived during the battle, the second soon after).

Charles XIV John (Swedish: Karl XIV Johan; 26 January 1763 – 8 March 1844) was King of Sweden and Norway from 1818 until his death in 1844 and the first monarch of the Bernadotte dynasty. In Norway, he is known as Charles III John (Norwegian: Karl III Johan); before he became royalty in Sweden, his name was Jean-Baptiste Jules Bernadotte. During the Napoleonic Wars, he participated in battles as a Marshal of France. Born in Pau in the region of southern France known as Béarn, Bernadotte joined the French Royal Army in 1780. Following the outbreak of the French Revolution, he demonstrated great military talent, rising rapidly through the ranks and becoming a brigadier general by 1794. He served with distinction in Italy and Germany, and was briefly Minister of War. His relationship with Napoleon was turbulent; nevertheless, Napoleon named him a Marshal of the Empire on the proclamation of the French Empire. Bernadotte played a significant role in the French victory at Austerlitz, and was made Prince of Pontecorvo as a reward. His marriage to Désirée Clary, whose sister was married to Joseph Bonaparte, made Bernadotte a member of the extended Imperial family. In 1810, Bernadotte was unexpectedly elected the Crown Prince to the childless King Charles XIII of Sweden, thanks to the advocacy of Baron Carl Otto Mörner, a Swedish courtier and obscure member of the Riksdag of the Estates. He assumed the name Charles (Carl) after his adoptive father and John (Johan), which is a Swedish version of Jean. He was subsequently named regent and generalissimo of the Swedish Armed Forces, soon after his arrival becoming de facto head of state for most of his time as Crown Prince. In 1812, following the sudden unprovoked French invasion of Swedish Pomerania, Crown Prince Charles John was instrumental in the creation of the Sixth Coalition by allying with Alexander I of Russia and using Swedish diplomacy to bring warring Russia and Britain together in alliance. He then played a major role in the writing of the Trachenberg Plan, the war-winning Allied campaign plan, and commanded the Allied Army of the North that defeated two concerted French attempts to capture Berlin and made the decisive attack on the last day of the catastrophic French defeat at Leipzig. Following the conclusion of the Leipzig campaign and after liberating Bremen and Lübeck from the French in late November 1813, Charles John invaded Denmark, aiming to knock Napoleon's last major ally out of the war to secure the Coalition's northern flank in preparation for the invasion of France in 1814 and to secure Norway for Sweden, as stipulated in the several treaties that created the Sixth Coalition. After a brief campaign that saw the defeat of the Danish Army, King Frederick VI of Denmark was forced to sign the Treaty of Kiel on 15 January 1814 that ceded Norway to Sweden, that in turn led to the Swedish–Norwegian War of 1814, where Norway was defeated in nineteen days. This put Norway into a union with Sweden, which lasted for almost a century before its peaceful 1905 dissolution. The Swedish–Norwegian war is viewed as Sweden's last direct conflict and war. Upon the death of Charles XIII in 1818, Charles John ascended to the throne. He presided over a period of peace and prosperity, and reigned until his death in 1844.

Jarvis Island is an uninhabited 4.5 km2 (1.7 sq mi) coral island located in the South Pacific Ocean, about halfway between Hawaii and the Cook Islands. It is an unincorporated, unorganized territory of the United States, administered by the United States Fish and Wildlife Service of the United States Department of the Interior as part of the National Wildlife Refuge system. Unlike most coral atolls, the lagoon on Jarvis is wholly dry.

Nat Turner (October 2, 1800 – November 11, 1831) was an enslaved Black carpenter and preacher who led a four-day rebellion of both slave and free Black people in Southampton County, Virginia, in August 1831. Turner's Rebellion resulted in the death of 55 White people before state militias suppressed the uprising. At the same time, as many as 120 Black men, women, and children, many of whom were not involved in the revolt, were killed by soldiers and local mobs in retaliation. Turner was captured in October 1831 and, after a trial, was executed in November. Before his execution, he told his story to attorney Thomas Ruffin Gray, who published The Confessions of Nat Turner in November 1831. In 2002, scholar Molefi Kete Asante included Nat Turner on his list of 100 Greatest African Americans. Turner has been depicted in films, literature, and plays, as well as many scholarly works.

The Tlingit or Lingít are an Indigenous people of the Pacific Northwest Coast of North America. Tlingit people are Alaska Natives and First Nations in Canada. They speak the Tlingit language, a Na-Dene language.

The Lincoln–Douglas debates were a series of seven debates in 1858 between Abraham Lincoln, the Republican Party candidate for the United States Senate from Illinois, and incumbent Senator Stephen Douglas, the Democratic Party candidate. Until the Seventeenth Amendment to the United States Constitution, which provides that senators shall be elected by the people of their states, was ratified in 1913, senators were elected by their respective state legislatures. Therefore, Lincoln and Douglas were trying to win the people's votes for legislators in the Illinois General Assembly, aligned with their respective political parties. The debates were designed to generate publicity—some of the first examples of what in modern parlance would be characterized as "media events". For Lincoln, they were an opportunity to raise both his state and national profile and that of the burgeoning Republican Party, newly organized four years before in Ripon, Wisconsin, in 1854. For Senator Douglas, they were an opportunity to defend his record—especially his role in promoting the doctrine of popular sovereignty, which, under the Kansas–Nebraska Act of 1854 allowed the white people of each new state to decide whether to allow slavery in the state. The candidates spoke in each of Illinois's nine congressional districts. They had already spoken in the state capital of Springfield and in the state's largest city of Chicago within a day of each other, so they decided that their future joint appearances would be held in the remaining seven congressional districts. Since Douglas was the incumbent, he had very little to gain from these debates. However, Lincoln, only a one-term U.S. Representative (congressman) a decade before, was gaining support, having spoken the day after Douglas spoke in Chicago, and thus presenting a rejoinder Douglas could not answer back with a rebuttal. Each debate lasted about three hours, with each candidate speaking for sixty minutes, followed by a ninety-minute response and a final thirty-minute rejoinder by the first candidate.Douglas and Lincoln alternated who spoke first at the debates; as the incumbent, Douglas spoke first in four. They were held outdoors, weather permitting, from about 2 to 5 p.m. The debates focused on slavery, specifically on whether it should be allowed in the new states to be formed from the western federal territories acquired through the Louisiana Purchase of 1803 and the Mexican Cession of 1849. Douglas, as the Democratic candidate, held that the decision should be made by the white residents of the new states rather than by the federal government ("popular sovereignty"). Lincoln argued against the expansion of slavery, yet stressed that he was not advocating its abolition where it already existed. Never in American history had there been widespread newspaper coverage of political debates. Both candidates felt they were speaking to the whole nation. New technology had become available in recent years: railroad networks, the electric telegraph with its Morse code, and Pitman shorthand writing, at that time called "phonography". The state's largest newspapers, based in Chicago, sent phonographers—now known as stenographers—to copy and report complete texts of each debate; thanks to the new railroads, the debates were not hard to reach from Chicago. Halfway through each debate and series of speeches, runners were handed the stenographers' notes. They raced to meet the next train to Chicago, handing the notes to railway riding stenographers who during the journey converted the shorthand symbols and abbreviations back into their original words, producing a transcript ready for the Chicago typesetters printing presses, and for the telegrapher, who sent the texts to the rest of the country east of the Rocky Mountains, which was as far as the telegraph wires reached. The next train would deliver the conclusion of the debate. The papers published the speeches in full, sometimes within hours of their delivery. Some newspapers helped their preferred candidate with minor corrections, reports on the audience's positive reaction, or tendentious headlines ("New and Powerful Argument by Mr. Lincoln–Douglas Tells the Same Old Story"). The newswire of the Associated Press, then only a decade old, sent messages simultaneously to multiple points, enabling newspapers and magazines east of the Rockies to print the debates soon after they occurred, which led to the debates rapidly becoming nationally followed events. They were later republished as pamphlets. The debates took place between August and October of 1858. Newspapers reported 12,000 in attendance in Ottawa (Illinois), 16,000 to 18,000 in Galesburg, 15,000 in Freeport, 12,000 in Quincy, and at the last debate in Alton, 5,000 to 10,000. The debates near Illinois's borders (Freeport, Quincy, and Alton) drew large numbers of people from neighboring states. A number travelled within Illinois to follow the debates. Douglas was re-elected by the Illinois General Assembly, 54–46. But Lincoln's party had won the popular vote in what historian Allen Guelzo labels "an upset, not just in terms of those voting statistics", but in making Lincoln a national figure and laying the groundwork for his 1860 presidential campaign. As part of that endeavor, Lincoln edited the texts of all the debates and had them published in a book. It sold well and helped him receive the Republican Party's nomination for president at the 1860 Republican National Convention in Chicago.

The Stadtpark (German: [ˈʃtatˌpaʁk] , City Park) in Vienna, Austria is a large municipal park that extends from the Ringstraße in the Innere Stadt first district up to the Heumarkt (Hay Market) in the Landstraße third district. The park is divided in two sections by the Wienfluss (Vienna River), and has a total surface area of 65,000 square metres (28 acres). Scattered throughout the park are statues of famous Viennese artists, writers, and composers, including Hans Canon, Emil Jakob Schindler, Johann Strauss II, Franz Schubert, and Anton Bruckner. The opulent Kursalon building on Johannesgasse, with its broad terrace that reaches into the park, is the site of popular waltz concerts.

Lawrence is a city in and the county seat of Douglas County, Kansas, United States, and the sixth-largest city in the state. It is in the northeastern sector of the state, astride Interstate 70, between the Kansas and Wakarusa rivers. As of the 2020 census, the population of the city was 94,934. The city is a college town with a significant student population, because it is home to both the University of Kansas (KU) and Haskell Indian Nations University (HINU).

The American Bar Association (ABA) is a voluntary national bar association of lawyers and law students in the United States, and not specific to any single jurisdiction. Founded in 1878, the ABA's stated activities are the setting of academic standards for law schools, and the formulation of model ethical codes related to the legal profession. As of fiscal year 2017, the ABA had 194,000 dues-paying members, constituting approximately 24.4% of American attorneys. In 1979, half of all lawyers in the U.S. were members of the ABA. In 2016, about one third of the 1.3 million practicing lawyers in the U.S. were included in the ABA membership of 400,000, with figures largely unchanged in 2024; Included are "about 150,000 paying members" for 2024–2025, according to Reuters. The organization's national headquarters are in Chicago, Illinois, with a branch office in Washington, D.C.. The association is affiliated with the law, legal, and professional research sponsoring organization the American Bar Foundation.

Knock (Irish: An Cnoc, meaning 'The Hill' – but now more generally known in Irish as Cnoc Mhuire, 'Hill of (the Virgin) Mary') is a village in County Mayo, Ireland. Knock is also a civil parish in the ancient barony of Costello. It is notable as the location of Knock Shrine - a Marian shrine and place of pilgrimage. According to Catholic beliefs, Mary, mother of Jesus, Saint Joseph and Saint John the Evangelist appeared to witnesses in the village on 21 August 1879. In the 20th century, Knock became one of Europe's most visited shrines to the Virgin Mary, along with Lourdes and Fatima. It was a focus of peace pilgrimages in Ireland during the Second World War, when the faithful prayed for peace. One and a half million pilgrims visit the shrine annually. In 1979, on the centenary of the apparition, Pope John Paul II visited the shrine. On 26 August 2018, Pope Francis visited the basilica while in Ireland for the 9th World Meeting of Families.

On August 21, 1883, a violent and devastating tornado affected southeastern portions of the U.S. state of Minnesota. The massive tornado, retrospectively estimated to have been an F5 on the modern Fujita scale, caused at least 37 deaths and over 200 injuries. The tornado was part of a tornado family, a series of tornadoes produced by a supercell, that included at least two significant tornadoes across Southeast Minnesota on August 21. A third significant tornado occurred two hours before the main event hit Rochester. The Rochester tornado indirectly led to the formation of Saint Mary's Hospital, now part of the Mayo Clinic. The tornado closely followed destructive tornadoes a month earlier in the same area: on July 21, two significant, deadly tornadoes hit the area, including an F4 tornado family that killed four people in Dodge and Olmsted Counties, especially near Dodge Center.

An adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations. Consequently, the earliest adding machines were often designed to read in particular currencies. Adding machines were ubiquitous office equipment in developed countries for most of the twentieth century.

The Thomasites were a group of 600 American teachers who traveled from the United States to the newly occupied territory of the Philippines on the US Army Transport Thomas. The group included 346 men and 180 women, hailing from 43 different states and 193 colleges, universities, and normal schools. The term 'Thomasites' (Spanish: Tomasitos) has since expanded to include any teacher who arrived in the first few years of the American colonial period of the Philippines. Thomas carried nearly 500 Thomasites, who arrived in Manila in August 1901. They represented 192 institutions, including Harvard (19), Yale (15), Cornell (13), University of Chicago (8), University of Michigan (24), University of California (25), Albion College (1), Alma College (2), Kalamazoo College (1), the Michigan State Normal School at Ypsilanti (now Eastern Michigan University) (6), and Olivet College (3).

The Mona Lisa is a half-length portrait painting by the Italian artist Leonardo da Vinci. Considered an archetypal masterpiece of the Italian Renaissance, it has been described as "the best known, the most visited, the most written about, the most sung about, [and] the most parodied work of art in the world". The painting's novel qualities include the subject's enigmatic expression, the monumentality of the composition, the subtle modelling of forms, and the atmospheric illusionism.

World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. One of the deadliest conflicts in history, World War I caused 15 to 22 million deaths, including those resulting from war crimes and genocides. The war also contributed to the spread of the Spanish flu pandemic. The conflict saw important developments in weaponry, including machine guns, artillery, aircraft, chemical weapons, and tanks.

The Second Battle of the Somme of 1918 was fought during the First World War on the Western Front from late August to early September, in the basin of the River Somme. It was part of a series of successful counter-offensives in response to the German Spring Offensive, after a pause for redeployment and supply. The most significant feature of the two 1918 Somme battles was that with the failure of the first 1918 Somme Battle (not to be confused with the 1916 Battle of the Somme) having halted what had begun as a large German offensive, the second formed the central part of the Allies' advance to the Armistice of 11 November.

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 Dumbarton Oaks Conference, or, more formally, the Washington Conversations on International Peace and Security Organization, was an international conference at which proposals for the establishment of a "general international organization", which was to become the United Nations, were formulated and negotiated. The conference was led by the Four Policemen – the United States, the United Kingdom, the Soviet Union, and China. It was held at the Dumbarton Oaks estate in Washington, D.C., from August 21, 1944, to October 7, 1944.

Operation Tractable was the final attack conducted by Canadian and Polish troops, supported by a British tank brigade, during the Battle of Normandy during World War II. The operation was to capture the tactically important French town of Falaise and then the smaller towns of Trun and Chambois. This operation was undertaken by the First Canadian Army with the 1st Polish Armoured Division and a British armoured brigade against Army Group B of the Westheer in what became the largest encirclement on the Western Front during the Second World War. Despite a slow start and limited gains north of Falaise, novel tactics by the 1st Polish Armoured Division during the drive for Chambois enabled the Falaise Gap to be partially closed by 19 August 1944, trapping about 150,000 German soldiers in the Falaise Pocket.

Haroutune Krikor Daghlian Jr. was an American physicist involved in the Manhattan Project, which designed and produced the atomic bombs that were used in World War II. He accidentally irradiated himself on August 21, 1945, during a critical mass experiment at the remote Omega Site of the Los Alamos Laboratory in New Mexico and died 25 days later from the resultant radiation poisoning.

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a transcontinental country that spanned much of Eurasia from its formation in 1922 until its dissolution in 1991. It was the world's third-most populous country, the largest by area, and bordered twelve other countries. A diverse multinational state, it was organized as a federal union of national republics, with the largest and most populous being the Russian Soviet Federative Socialist Republic (SFSR). The world's flagship communist state, it was governed by the Communist Party under Marxism–Leninism, through soviet councils. The Soviet economy was also centrally planned. Its capital and largest city was Moscow.

The president of the United States (POTUS) is the head of state and head of government of the United States. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.

The Xá Lợi Pagoda raids were a series of synchronized attacks on a number of Buddhist pagodas in the major cities of South Vietnam shortly after midnight on 21 August 1963. The raids were executed by the Army of the Republic of Vietnam Special Forces under Colonel Lê Quang Tung and combat police, both of which took their orders directly from Ngô Đình Nhu, the younger brother of the Catholic president Ngô Đình Diệm. The Xá Lợi Pagoda, the largest in the South Vietnamese capital Saigon, was the most prominent of the raided temples. Over 1,400 Buddhists were arrested, and estimates of the death toll and missing ranged up to the hundreds. In response to the Huế Vesak shootings and a ban on the Buddhist flag in early May, South Vietnam's Buddhist majority rose in widespread civil disobedience and protest against the religious bias and discrimination of the Catholic-dominated Diệm government. Buddhist temples in major cities, most prominently the Xá Lợi pagoda, became focal points for protesters and assembly points for Buddhist monks from rural areas.

The Socialist Republic of Romania was a communist state that existed from 1947 to the Romanian revolution in 1989. From 1947 to 1965, the state was known as the Romanian People's Republic. The RSR was an Eastern Bloc state and a member of the Warsaw Pact with a dominant role for the Romanian Communist Party enshrined in its constitutions. Geographically, RSR was bordered by the Black Sea to the east, the Soviet Union to the north and east, Hungary and Yugoslavia to the west, and Bulgaria to the south.

The Cold War was a period of international geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc. It began in the aftermath of the Second World War and ended with the dissolution of the Soviet Union in 1991. The term cold war is used because there was no direct fighting between the two superpowers, though each supported opposing sides in regional conflicts known as proxy wars. In addition to the struggle for ideological and economic influence and an arms race in both conventional and nuclear weapons, the Cold War was expressed through technological rivalries such as the Space Race, espionage, propaganda campaigns, embargoes, and sports diplomacy.

Private First Class James Anderson Jr. was a United States Marine who posthumously received the Medal of Honor for heroism while serving in Vietnam in February 1967. When his Medal of Honor was awarded on August 21, 1968, he became the first African American U.S. Marine recipient of the Medal of Honor while serving in Vietnam.

The Liberal Party of the Philippines is a liberal political party in the Philippines.

The Lebanese Civil War was a multifaceted armed conflict fought in Lebanon from 1975 to 1990. It resulted in an estimated 120,000 deaths, displaced nearly one million people, and caused widespread destruction across the country.

Benigno Simeón "Ninoy" Aquino Jr., was a Filipino politician and journalist who served as a senator of the Philippines (1967–1972) and governor of the province of Tarlac (1963–1967). Aquino was the husband of Corazon Aquino, who became the 11th president of the Philippines after his assassination, and father of Benigno Aquino III, who became the 15th president of the Philippines. Aquino, together with Gerry Roxas and Jovito R. Salonga, helped form the leadership of the Liberal Party-based coalition against ex-President Ferdinand Marcos. Aquino was a significant emotional leader, who, together with the intellectual leader Sen. Jose W. Diokno, led the overall opposition.

A volcano is a vent or fissure in the crust of a planetary-mass object that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually nonexplosive whereas those resulting from convergent tectonic activity cause violent eruptions. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift, the Wells Gray-Clearwater volcanic field, and the Rio Grande rift in North America. Volcanism away from plate boundaries most likely arises from upwelling diapirs from the core–mantle boundary called mantle plumes, 3,000 kilometres (1,900 mi) deep within Earth. This results in hotspot volcanism or intraplate volcanism, in which the plume may cause thinning of the crust and result in a volcanic island chain due to the continuous movement of the tectonic plate, of which the Hawaiian hotspot is an example. Volcanoes are usually not created at transform tectonic boundaries where two tectonic plates slide past one another.

Latvia, officially the Republic of Latvia, is a country in the Baltic region of northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to the southeast and shares a maritime border with Sweden to the west. Latvia covers an area of 64,573 km2 (24,932 sq mi), with a population of 1.83 million. The country has a temperate seasonal climate. Its capital and largest city is Riga. Latvians, who are the titular nation and comprise 65.5% of the country's population, belong to the ethnolinguistic group of the Balts and speak Latvian. Russians are the most prominent minority in the country, at almost a quarter of the population; 37.7% of the population speak Russian as their native tongue.

In August 1991, hardliners of the Communist Party of the Soviet Union (CPSU) attempted to forcibly seize control of the country from Mikhail Gorbachev, who was Soviet president and General Secretary of the CPSU at the time. The coup leaders consisted of top military and civilian officials, including Vice President Gennady Yanayev, who together formed the State Committee on the State of Emergency. Opposed to Gorbachev's reform program, they were angry at the loss of control over Eastern European states and fearful of the New Union Treaty, which was on the verge of being signed by the Soviet Union (USSR). The treaty was to decentralize much of the central Soviet government's power and distribute it among its fifteen republics. Boris Yeltsin's demand for more autonomy to the republics opened a window for the plotters to organize the coup. The attempt took place between 19 and 21 August 1991; as a result, the events were referred to as the August Coup.

The National Aeronautics and Space Administration is an independent agency of the U.S. federal government responsible for the United States' civil space program, as well as research in aeronautics and space. Headquartered in Washington, D.C., NASA operates ten field centers across the US and is organized into three mission directorates: Human Spaceflight, Research and Technology, and Science. Established in 1958 amid the Space Race, NASA succeeded the National Advisory Committee for Aeronautics (NACA) to give the US space program a distinct civilian orientation focused on peaceful applications. Since then, it has led most American spaceflight programs, including Project Mercury, Project Gemini, the Apollo program, Skylab, the Space Shuttle, the International Space Station (ISS), and the ongoing multinational Artemis program.

Royal Air Maroc Flight 630 was a passenger flight on 21 August 1994 which crashed approximately ten minutes after takeoff from Agadir–Al Massira Airport in Morocco. All 44 passengers and crew on board were killed. It was the deadliest ATR 42 aircraft crash at that point in time. An investigation showed that the crash was deliberately caused by one of the pilots.

On August 21, 1995, Atlantic Southeast Airlines Flight 529, an Embraer EMB 120 Brasilia flying from Atlanta, Georgia, to Gulfport, Mississippi, crashed in the community of Burwell between the cities of Bowdon, Georgia, and Carrollton, Georgia. Out of the 29 people on board, 9 were killed. The accident bore similarities to Atlantic Southeast Airlines Flight 2311, which had occurred four years earlier, and resulted in the deaths of all 23 people on board. The inquiries of both crashes concluded that design flaws in the aircraft's propellers were to blame.

Eldrick Tont "Tiger" Woods is an American professional golfer. He is widely regarded as one of the greatest golfers of all time and as one of the most famous athletes in modern history. Woods is tied for first in PGA Tour wins, ranks second in men's major championships, holds numerous golf records, and is an inductee of the World Golf Hall of Fame.

The Ghouta chemical attack was a chemical attack carried out by the forces of Syrian President Bashar al-Assad, in the early hours of 21 August 2013 in Ghouta, Syria during the Syrian civil war. It was the deadliest use of chemical weapons in Syrian conflict and since the Iran–Iraq War. Two opposition-controlled areas in the suburbs around Damascus were struck by rockets containing the chemical agent sarin. Estimates of the death toll range from 281 to 1,729 people. The attack led to an international agreement to eliminate Syria's chemical weapons, but this was not completed and further chemical attacks occurred, including Khan Shaykhun in 2017 and Douma in 2018.

A total solar eclipse, dubbed the "Great American Eclipse" by some media, occurred on Monday, August 21, 2017. It was visible within a band that spanned the contiguous United States from the Pacific to the Atlantic coasts. It was also visible as a partial solar eclipse from as far north as Nunavut in northern Canada to as far south as northern South America. In northwestern Europe and Africa, it was partially visible in the late evening. In northeastern Asia, it was partially visible at sunrise.