April 15 in History

The Lateran Council of 769 was a synod held in the Basilica of St. John Lateran to rectify perceived abuses in the papal electoral process which had led to the elevation of the antipopes Constantine II and Philip. It also condemned the rulings of the Council of Hieria. It is perhaps the most important Roman council held during the 8th century.

Bari ( BAR-ee; Italian: [ˈbaːri] ; Barese: Bare [ˈbæːrə]; Latin: Barium) is the capital city of the Metropolitan City of Bari and of the region of Apulia, on the Adriatic Sea in southern Italy. It is one of the most important economic centres of mainland southern Italy. It is a port and university city as well as the city of Saint Nicholas. The city itself is the 9th-largest city in Italy with a population of 316,248, while the urban area has approximately 750,000 inhabitants. Its metropolitan province is the 5th-largest metropolitan city in the country, with a population of 1,218,073. Bari is made up of four different urban sections. To the north is the closely built old town on the peninsula between two modern harbours, with the Basilica of Saint Nicholas, the Cathedral of San Sabino (1035–1171) and the Norman-Swabian Castle, which is now also a major nightlife district. To the south is the Murat quarter (erected by Joachim Murat), the modern heart of the city, which is laid out on a rectangular grid-plan with a promenade on the sea and the major shopping district (the via Sparano and via Argiro). Modern residential zones surrounding the centre of Bari were built during the 1960s and 1970s replacing the old suburbs that had developed along roads splaying outwards from gates in the city walls. In addition, the outer suburbs developed rapidly during the 1990s.

The Sharif of Mecca was the title of the leader of the Sharifate of Mecca, traditional steward of the Islamic holy cities of Mecca and Medina. The term sharif is Arabic for "noble", "highborn", and is used to describe the descendants of Hashim ibn Abd Manaf.

Henry VI (German: Heinrich VI.; November 1165 – 28 September 1197), a member of the Hohenstaufen dynasty, was King of Germany (King of the Romans) from 1169 and Holy Roman Emperor from 1191 until his death. From 1194, he was also King of Sicily as the husband and co-ruler of Queen Constance I. Henry was the second son of Emperor Frederick Barbarossa and Beatrice I, Countess of Burgundy. Well educated in the Latin language, as well as Roman and canon law, he was also a patron of poets and a skilled poet himself. In 1186, he married Constance of Sicily. Henry, stuck in the Hohenstaufen conflict with the House of Welf until 1194, had to enforce the inheritance claims by his wife against her nephew Count Tancred of Lecce. His attempt to conquer the Kingdom of Sicily failed at the siege of Naples in 1191 due to an epidemic, with Empress Constance captured. Based on an enormous ransom for the release and submission of King Richard I of England, he conquered Sicily in 1194; however, the intended unification with the Holy Roman Empire ultimately failed due to the opposition of the Papacy. In Sicily, Henry had a reputation for ruthless suppression of political opponents. To this day, he is sometimes given the epithet "the Cruel" (il crudele) by Italian historiographers. Henry threatened to invade the Byzantine Empire after 1194 and succeeded in extracting a ransom, the Alamanikon, from Emperor Alexios III Angelos in return for cancelling the invasion. He made the Kingdom of Cyprus and the Armenian Kingdom of Cilicia formal subjects of the empire and compelled Tunis and Tripolitania to pay tribute to him. Between 1195 and 1196, he attempted to turn the Holy Roman Empire from an elective to a hereditary monarchy, the so-called Erbreichsplan, but met strong resistance from the prince-electors. Henry pledged to go on crusade in 1195 and began preparations. A revolt in Sicily was crushed in 1197. The Crusaders set sail for the Holy Land that same year, but Henry died of malaria at Messina before he could join them. His death plunged the Empire into the chaos of the German throne dispute for the next 17 years.

The Mamluk Sultanate, also known as Mamluk Egypt or the Mamluk Empire, was a state that ruled Egypt, the Levant and the Hejaz from the mid-13th to early 16th centuries, with Cairo as its capital. It was ruled by a military caste of mamluks headed by a sultan. The sultanate was established with the overthrow of the Ayyubid dynasty in Egypt in 1250 and was conquered by the Ottoman Empire in 1517. Mamluk history is generally divided into the Turkic or Bahri period (1250–1382) and the Circassian or Burji period (1382–1517), named after the predominant ethnicity or corps of the ruling Mamluks during these respective eras.

The Battle of Formigny, fought on 15 April 1450, took place towards the end of the Hundred Years' War between England and France. A decisive French victory that destroyed the last significant English field army in Normandy, it paved the way for the recapture of their remaining strongholds. Although cannon had been employed in siege warfare since the early 14th century, Formigny is notable as one of the first recorded uses of field artillery on a European battlefield.

The Battle of Rain took place on 15 April 1632 near Rain in Bavaria during the Thirty Years' War. A Swedish army under Gustavus Adolphus of Sweden defeated a Catholic League force led by Johann Tserclaes, Count of Tilly, who later died of wounds received in the battle. Outnumbered and with many inexperienced troops, Tilly built defensive works along the River Lech, centred on the town of Rain, hoping to delay Gustavus long enough for Imperial reinforcements under Albrecht von Wallenstein to reach him. The Swedes spent 14 April bombarding the defences, then crossed the river the next day, inflicting nearly 3,000 casualties, including Tilly. On 16 April, Maximilian of Bavaria ordered a retreat, abandoning his supplies and guns. Despite this victory, the Swedes had been drawn away from their bases in Northern Germany and when Maximilian linked up with Wallenstein found themselves besieged in Nuremberg. This led to the largest battle of the war on 3 September, when an assault on the Imperial camp outside the town was bloodily repulsed.

The Irish Confederate Wars took place from 1641 to 1653. The conflict began with the Irish rising of 1641 and evolved into a prolonged struggle over Ireland's future, as Irish forces sought to defend their land, political rights and autonomy against foreign control, plantation policies and continued encroachment on Irish self-government. Although linked to the wider Wars of the Three Kingdoms, the war in Ireland had its own distinct causes and objectives rooted in resistance to English rule, the recovery of confiscated lands and the defence of Irish interests. The conflict caused an estimated 200,000 deaths from fighting, as well as war-related famine and disease.

The Kingdom of Corsica was a short-lived kingdom on the island of Corsica. It was formed after the islanders crowned the German adventurer Theodor Stephan Freiherr von Neuhoff as King of Corsica.

Serse (Italian pronunciation: [ˈsɛrse]; English title: Xerxes; HWV 40) is an opera seria in three acts by George Frideric Handel. It was first performed in London on 15 April 1738. The Italian libretto was adapted by an unknown hand from that by Silvio Stampiglia (1664–1725) for an earlier opera of the same name by Giovanni Bononcini in 1694. Stampiglia's libretto was itself based on one by Nicolò Minato (ca.1627–1698) that was set by Francesco Cavalli in 1654. The opera is set in Persia (modern-day Iran) about 470 BC and is very loosely based upon Xerxes I of Persia. Serse, originally sung by a mezzo-soprano castrato, is now usually performed by a female mezzo-soprano or countertenor. The opening aria, "Ombra mai fu", sung by Xerxes to a plane tree (Platanus orientalis), is set to one of Handel's best-known melodies, and is often known as Handel's "Largo" (despite being marked "larghetto" in the score).

Samuel Johnson (18 September [O.S. 7 September] 1709 – 13 December 1784), often called Dr Johnson, was an English writer and polymath who made lasting contributions as a poet, playwright, essayist, moralist, literary critic, sermonist, biographer, editor, and lexicographer (creator of dictionaries). The work for which he is best known is his 42,733-entry Dictionary of the English Language (1755). For this and other contributions in and to the English language, the Oxford Dictionary of National Biography has called him "arguably the most distinguished man of letters in English history". Born in Lichfield, Staffordshire, he attended Pembroke College, Oxford, until lack of funds forced him to leave. After working as a teacher, he moved to London and began writing for The Gentleman's Magazine. Early works include the poem London (1738), the biography Life of Mr Richard Savage (1744), the poem The Vanity of Human Wishes (1749) and the play Irene (1749). After nine years' effort, Johnson's A Dictionary of the English Language (1755) appeared and was acclaimed as "one of the greatest single achievements of scholarship". Later works included The History of Rasselas, Prince of Abissinia (1759) and The Plays of William Shakespeare (1765). In 1763, he befriended James Boswell, with whom he travelled to Scotland; Johnson described his travels in A Journey to the Western Islands of Scotland (1775). Near the end of his life, he authored the voluminous and highly influential Lives of the Most Eminent English Poets (1779–1781), a series of biographies and critical appraisals of 52 poets of the 17th and 18th centuries. Johnson was a devout Anglican Christian and a committed Tory. Although tall and robust, he was deaf in one ear and blind in one eye. For most of his life he made regular and uncontrolled gestures and tics that disconcerted some upon meeting him. Boswell and other biographers documented Johnson's behaviour and mannerisms in such detail that they have informed a posthumous diagnosis of Tourette syndrome, a condition neither defined nor manageable in the 18th century. After several illnesses, and extended periods of mental struggle and loneliness, Johnson died on the evening of 13 December 1784, aged 75; he is buried in Westminster Abbey. Johnson became a celebrity in his later life, "the acknowledged Head of Literature in this kingdom". Following his death, he was increasingly recognised as having had a major and lasting effect on the practice of literary criticism—it was even claimed that he was the one truly great critic of English literature. A prevailing mode of literary theory in the 20th century (one focused upon the language used by literature) drew heavily upon his work, and he likewise had a lasting impact on the forms, research and writing of biography. Johnson's Dictionary had and continues to have far-reaching effects on Modern English—this was an early, major, and widely respected, dictionary of English: it was pre-eminent, at least until the arrival of the Oxford English Dictionary some 150 years later. His life was also a story worth telling: Boswell's 1791 biography, The Life of Samuel Johnson, LLD, was selected by fellow Johnson-biographer Walter Jackson Bate as "the most famous single work of biographical art in the whole of literature".

Thomas Hopkins Gallaudet (December 10, 1787 – September 10, 1851) was an American educator. Along with Laurent Clerc and Mason Cogswell, he co-founded the first permanent institution for the education of the deaf in North America, and he became its first principal. When opened on April 15, 1817, it was called the "Connecticut Asylum (at Hartford) for the Education and Instruction of Deaf and Dumb Persons", but it is now known as the American School for the Deaf.

Abraham Lincoln (February 12, 1809 – April 15, 1865) was the 16th president of the United States, from 1861 until his assassination in 1865. He led the United States through the American Civil War, defeating the Confederacy and playing a major role in the abolition of slavery. Born in a one-room log cabin in Kentucky, Lincoln was raised on the frontier. He was self-educated and became a lawyer, Illinois state legislator, and U.S. representative. Angered by the Kansas–Nebraska Act of 1854, which opened the territories to slavery, he became a leader of the new Republican Party. He reached a national audience in the 1858 Senate campaign debates against Stephen A. Douglas. Lincoln won the 1860 presidential election, becoming the first Republican president. His victory prompted a majority of the slave states to begin seceding and form the Confederate States. A month after Lincoln assumed the presidency, Confederate forces attacked Fort Sumter, starting the Civil War. As a moderate Republican, Lincoln had to navigate conflicting political opinions from contentious factions during the war effort. He closely supervised the Union's strategy and tactics, including the selection of generals and the implementation of a naval blockade of Southern ports. He suspended the writ of habeas corpus in April 1861, an action that Chief Justice Roger Taney found in Ex parte Merryman that only Congress could do, and he averted war with Britain by defusing the Trent Affair. On January 1, 1863, he issued the Emancipation Proclamation, which declared the slaves in the states "in rebellion" to be free. On November 19, 1863, he delivered the Gettysburg Address, which became one of the most famous speeches in American history. He promoted the Thirteenth Amendment to the U.S. Constitution, which, in 1865, abolished chattel slavery. Following his re-election in 1864, he sought to heal the war-torn nation through Reconstruction. On April 14, 1865, five days after the Confederate surrender at Appomattox, Lincoln was fatally shot by John Wilkes Booth at Ford's Theatre in Washington, D.C., becoming the first U.S. president to be assassinated. Lincoln is remembered as a martyr and a national hero for his wartime leadership and for his efforts to preserve the Union and abolish slavery. He is consistently ranked in both popular and scholarly polls as among the greatest presidents in American history.

On April 14, 1865, Abraham Lincoln, the 16th president of the United States, was shot in the head while attending a play at Ford's Theatre in Washington, D.C.. He died the following day, six weeks into his second term and a month before the conclusion of the American Civil War. Lincoln was watching the play Our American Cousin with his wife Mary Todd, Major Henry Rathbone, and Rathbone's fiancé Clara Harris when John Wilkes Booth, an actor and Confederate sympathizer, shot him from behind. Lincoln was taken to the Petersen House across the street, where he died the following morning. With Union victory imminent, Booth and his conspirators, including Lewis Powell, David Herold, and George Atzerodt, originally plotted to kidnap Lincoln to aid the Confederacy. After that plan failed to materialize, they decided to assassinate him, Secretary of State William H. Seward, and Vice President Andrew Johnson. Booth hoped that eliminating the three most important officials of the federal government would revive the Confederate cause. Powell and Herold were assigned to kill Seward, while Atzerodt was assigned to kill Johnson. Booth succeeded in killing Lincoln, but Powell only managed to wound Seward, while Atzerodt became drunk and never targeted Johnson. Booth fled into Maryland after shooting Lincoln and rendezvoused with Herold. Lincoln's secretary of war, Edwin Stanton, directed the largest manhunt in US history at the time, involving thousands of troops. After a 12-day search, on April 26, Booth and Herold were located at a tobacco farm in King George County, Virginia. Booth was fatally shot by Sergeant Boston Corbett after refusing to surrender. The other conspirators were captured by the end of April 1865, except for John Surratt, whom the US captured in Egypt in November 1866. Powell, Herold, Atzerodt, and Mary Surratt were hanged in July 1865, while John Surratt was released after a mistrial in 1867 and never retried. Johnson was hastily sworn in as the 17th president on April 15 and served for the remainder of Lincoln's second term. Lincoln's state funeral was held on April 19, after which a funeral train transported his remains through seven states for burial in Illinois. He was the third US president to die in office, and the first by assassination. The assassination drew international condemnation and left a profound impact on the US. It made Lincoln a national martyr and led to a lengthy period of mourning as the US entered the Reconstruction era.

General Electric Company (GE) was an American multinational conglomerate. It played a role in the development of electric power, electric light, home appliances, aviation, and medical imaging. GE was established in 1892 through the merger of Thomas Edison's Edison General Electric Company and the Thomson-Houston Electric Company, a consolidation conceived and orchestrated by financier J. P. Morgan. Over its history, GE had multiple divisions, including aerospace, transportation, energy, healthcare, lighting, locomotives, appliances, and finance. In 2020, GE ranked among the Fortune 500 as the 33rd largest firm in the United States by gross revenue. In 2023, the company was ranked 64th in the Forbes Global 2000. In 2011, GE ranked among the Fortune 20 as the 14th most profitable company, but later very severely underperformed the market (by about 75%) as its profitability collapsed. Two employees of GE—Irving Langmuir (1932) and Ivar Giaever (1973)—have been awarded the Nobel Prize. From 1986 until 2013, GE was the owner of the NBC television network through its purchase of its former subsidiary RCA before its acquisition of NBC's parent company NBCUniversal by Comcast in 2011. Following the Great Recession of the late 2000s, General Electric began selling off various divisions and assets, including its appliances and financial capital divisions, under Jeff Immelt's leadership as CEO. John Flannery, Immelt's replacement in 2017, further divested General Electric's assets in locomotives and lighting in order to focus the company more on aviation. Restrictions on air travel during the COVID-19 pandemic caused General Electric's revenue to fall significantly in 2020. Ultimately, GE's final CEO Larry Culp announced in November 2021 that General Electric was to be broken up into three separate, public companies by 2024. GE Aerospace, the aerospace company, is GE's legal successor. GE HealthCare, the health technology company, was spun off from GE in 2023. GE Vernova, the energy company, was founded when GE finalized the split. Following these transactions, GE Aerospace took the General Electric name and ticker symbols, while the old General Electric ceased to exist as a conglomerate.

The 1896 Summer Olympics, officially known as the Games of the I Olympiad, and commonly known as Athens 1896 (Greek: Αθήνα 1896), were the first international Olympic Games held in modern history. Organised by the International Olympic Committee (IOC), which had been created by French aristocrat Pierre de Coubertin, the event was held in Athens, Greece, from 6 to 15 April 1896. Fourteen nations (according to the IOC, though the number is subject to interpretation) and 241 athletes (all males; this number is also disputed) took part in the games. Participants were all European or living in Europe, with the exception of the United States team, and over 65% of the competing athletes were Greek. Winners were given a silver medal, while runners-up received a copper medal. Retroactively, the IOC has designated the top three finishers in each event as gold, silver, and bronze medalists. Ten of the 14 participating nations earned medals. On April 6, 1896, American James Connolly became the first Olympic medalist in more than 1,500 years, competing in the triple jump. The United States won the most gold medals, 11, while host nation Greece won the most medals overall, 47. The highlight for the Greeks was the marathon victory by their compatriot Spyridon Louis. The most successful competitor was German wrestler and gymnast Carl Schuhmann, who won four events. Athens had been chosen to stage the inaugural modern Games during a congress organised by Coubertin in Paris on 23 June 1894, during which the IOC was also created. The main venue was the Panathenaic Stadium, where athletics and wrestling took place; other venues included the Neo Phaliron Velodrome for cycling and the Zappeion for fencing. The opening ceremony was held in the Panathenaic Stadium on 6 April, during which most of the competing athletes were aligned on the infield, grouped by nation. After a speech by the president of the organising committee, Crown Prince Constantine, his father officially opened the Games. Afterwards, nine bands and 150 choir singers performed an Olympic Hymn, composed by Spyridon Samaras and written by Kostis Palamas. The 1896 Olympics were regarded as a great success. The Games had the largest international participation of any sporting event to that date. The Panathenaic Stadium overflowed with the largest crowd ever to watch a sporting event. After the Games, Coubertin and the IOC were petitioned by several prominent figures, including Greece's King George and some of the American competitors in Athens, to hold all the following Games in Athens. However, the 1900 Summer Olympics were already planned for Paris, and, with the exception of the Intercalated Games of 1906, the Olympics did not return to Greece until the 2004 Summer Olympics, 108 years later.

The Philippine–American War, known alternatively as the Filipino–American War, Philippine Insurrection, or Tagalog Insurgency, was a conflict from 1898 to 1902 between the United States and Philippine nationalists after the Spanish–American War. The United States ultimately prevailed, and maintained control of the Philippines until independence in 1946, other than a period of Japanese occupation between 1941 and 1945.

RMS Titanic was a British ocean liner that sank in the early hours of 15 April 1912 after striking an iceberg on her maiden voyage from Southampton, England, to New York City. Of the 2,208 passengers and crew aboard, approximately 1,500 died (estimates vary), making the incident one of the deadliest peacetime sinkings of a single ship. Titanic was operated by the White Star Line, one of the premier transatlantic services, and carried some of the wealthiest people in the world, as well as hundreds of emigrants from the British Isles, Scandinavia, and elsewhere in Europe who were seeking a new life in the United States and Canada. The disaster drew public attention, spurred major changes in maritime safety regulations, and inspired a lasting legacy in popular culture. At the time of her voyage, she was the largest ship afloat upon entering service and the second of three Olympic-class ocean liners built for the White Star Line. The ship was built by the Harland and Wolff shipbuilding company in Belfast and had advanced safety features, such as watertight compartments and remotely activated watertight doors, which contributed to the ship's reputation as "unsinkable". Additionally, the ship was equipped with twenty lifeboats: fourteen regular lifeboats, two were emergency cutters, and four collapsible boats, four over the British Board of Trade's regulations. Of the twenty boats, eighteen were launched successfully. The first-class accommodations were designed to be the pinnacle of comfort and luxury. They included a gymnasium, swimming pool, smoking rooms, fine restaurants and cafes, a Victorian-style Turkish bath, and opulent cabins. A high-powered spark-gap transmitter was provided by the Marconi Marine Company for first-class passenger use. However, the ship was primarily built as an immigration ship designed to carry around 1,000 third-class passengers. They provided comfortable accomodations for the standards of the time, including providing a dining saloon and an open space free for their personal use.

Braintree, officially the Town of Braintree, is a city in Norfolk County, Massachusetts, United States. It is officially known as a town, but Braintree is a city with a mayor–council form of government, and it is considered a city under Massachusetts law. The population was 39,143 at the 2020 census. It is part of the Greater Boston area, with access to the MBTA Red Line, and is a member of the Metropolitan Area Planning Council's South Shore Coalition. The first mayor of Braintree was Joe Sullivan, who served until January 2020. The current mayor of Braintree is Erin Joyce, who was elected in 2023, defeating incumbent Charles Kokoros.

John Benjamin Kendrick (September 6, 1857 – November 3, 1933) was an American politician and cattleman who served as a United States senator from Wyoming and as the ninth governor of Wyoming as a member of the Democratic Party.

Insulin is a peptide hormone produced by beta cells of the pancreatic islets encoded in humans by the insulin (INS) gene. It is the main anabolic hormone of the body. It regulates the metabolism of carbohydrates, fats, and protein by promoting the absorption of glucose from the blood into cells of the liver, fat, and skeletal muscles. In these tissues the absorbed glucose is converted into either glycogen, via glycogenesis, or fats (triglycerides), via lipogenesis; in the liver, glucose is converted into both. Glucose production and secretion by the liver are strongly inhibited by high concentrations of insulin in the blood. Circulating insulin also affects the synthesis of proteins in a wide variety of tissues. It is thus an anabolic hormone, promoting the conversion of small molecules in the blood into large molecules in the cells. Low insulin in the blood has the opposite effect, promoting widespread catabolism, especially of reserve body fat.

A popular uprising by Palestinian Arabs in Mandatory Palestine against the British administration, known as the Great Revolt, and later the Great Palestinian Revolt or the Palestinian Revolution, lasted from 1936 until 1939. The movement sought independence from British colonial rule and the end of British support for Zionism, including Jewish immigration and land sales to Jews. The uprising occurred during a peak in the influx of European Jewish immigrants, and with the growing plight of the rural fellahin rendered landless, who as they moved to metropolitan centres to escape their abject poverty found themselves socially marginalized. Since the Battle of Tel Hai in 1920, Jews and Arabs had been involved in a cycle of attacks and counter-attacks, and the immediate spark for the uprising was the murder of two Jews by a Qassamite band, and the retaliatory killing by Jewish gunmen of two Arab labourers, incidents which triggered a flare-up of violence across Palestine. A month into the disturbances, Amin al-Husseini, president of the Arab Higher Committee and Mufti of Jerusalem, declared 16 May 1936 as "Palestine Day" and called for a general strike. David Ben-Gurion, leader of the Yishuv, described Arab causes as fear of growing Jewish economic power, opposition to mass Jewish immigration and fear of the British identification with Zionism. The general strike lasted from April to October 1936. The revolt is often analysed in terms of two distinct phases. The first phase began as spontaneous popular resistance, which was seized on by the urban bourgeois Arab Higher Committee, giving the movement an organized shape that was focused mainly on strikes and other forms of political protest, in order to secure a political result. By October 1936, this phase had been defeated by the British civil administration using a combination of political concessions, international diplomacy (involving the rulers of Iraq, Saudi Arabia, Transjordan and Yemen) and the threat of martial law. The second phase, which began late in 1937, was a peasant-led resistance movement provoked by British repression in 1936 in which increasingly British forces were targeted as the army itself increasingly targeted the villages it thought supportive of the revolt. During this phase, the rebellion was brutally suppressed by the British Army and the Palestine Police Force using repressive measures that were intended to intimidate the whole population and undermine popular support for the revolt. A more dominant role on the Arab side was taken by the Nashashibi clan, whose NDP party quickly withdrew from the rebel Arab Higher Committee, led by the radical faction of Amin al-Husseini, and instead sided with the British – dispatching "Fasail al-Salam" (the "Peace Bands") in coordination with the British Army against nationalist and Jihadist Arab "Fasail" units (literally "bands"). According to official British figures covering the whole revolt, the army and police killed more than 2,000 Arabs in combat, 108 were hanged, and 961 died because of what they described as "gang and terrorist activities". In an analysis of the British statistics, Walid Khalidi estimates 19,792 casualties for the Arabs, with 5,032 dead: 3,832 killed by the British and 1,200 dead due to intracommunal terrorism, and 14,760 wounded. By one estimate, ten percent of the adult male Palestinian Arab population between 20 and 60 was killed, wounded, imprisoned or exiled. Estimates of the number of Palestinian Jews killed are up to several hundred. The Arab revolt in Mandatory Palestine was unsuccessful, and its consequences affected the outcome of the 1948 Palestine war. It caused the British Mandate to give crucial support to pre-state Zionist militias like the Haganah, whereas on the Palestinian Arab side, the revolt forced the main Palestinian Arab leader of the period, al-Husseini, into exile.

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 island of Malta was a British colony from 1813 to 1964 and the George Cross was awarded to the island in April 1942 by King George VI. The cross was awarded in recognition of Maltese resilience during the Siege of Malta by Italy and Germany in the early part of World War II. The George Cross was incorporated into the flag of Malta beginning in 1943 and remains on the current design of the flag.

Bergen-Belsen, or Belsen, was a Nazi concentration camp in what is today Lower Saxony in northern Germany, southwest of the town of Bergen near Celle. Originally established as a prisoner of war camp, in 1943, parts of it became a concentration camp. Initially this was an "exchange camp", where Jewish hostages were held with the intention of exchanging them for German prisoners of war held overseas. The camp was later expanded to hold Jews from other concentration camps, as a part of the Holocaust.

Jack Roosevelt Robinson (January 31, 1919 – October 24, 1972) was an American professional baseball player who was the first African American to play in Major League Baseball (MLB) in the modern era. Robinson broke the color line when he started at first base for the Brooklyn Dodgers on April 15, 1947. The Dodgers signing Robinson heralded the end of racial segregation in professional baseball, which had relegated black players to the Negro leagues since the 1880s. Born in Cairo, Georgia, Robinson was raised in Pasadena, California. A four-sport student athlete at Pasadena Junior College and the University of California, Los Angeles, he was better known for football than he was for baseball, becoming a star with the UCLA Bruins football team. Following his college career, Robinson was drafted for service during World War II, but was court-martialed for refusing to sit at the back of a segregated Army bus, eventually being honorably discharged. Afterwards, he signed with the Kansas City Monarchs of the Negro leagues, where he caught the eye of Branch Rickey, general manager of the Brooklyn Dodgers, who thought he would be the perfect candidate for breaking the MLB color line. During his 10-year MLB career, Robinson won the inaugural Rookie of the Year Award in 1947, was an All-Star for six consecutive seasons from 1949 through 1954, and won the National League (NL) Most Valuable Player Award in 1949—the first Black player so honored. Robinson played in six World Series and contributed to the Dodgers' 1955 World Series championship. He was inducted into the Baseball Hall of Fame in 1962 in his first year of eligibility. Robinson's character, his use of nonviolence, and his talent challenged the traditional basis of segregation that had then marked many other aspects of American life. He influenced the culture of and contributed significantly to the civil rights movement. Robinson also was the first Black television analyst in MLB and the first Black vice president of a major American corporation, Chock full o'Nuts. In the 1960s, he helped establish the Freedom National Bank, a Black American-owned financial institution based in Harlem, New York. After his death in 1972, Robinson was posthumously awarded the Congressional Gold Medal and Presidential Medal of Freedom in recognition of his achievements on and off the field. In 1997, MLB retired his uniform number, 42, across all Major League teams; he was the first professional athlete in any sport to be so honored. MLB also adopted a new annual tradition, "Jackie Robinson Day", for the first time on April 15, 2004, on which every player on every team wears the number 42.

The Boeing B-52 Stratofortress is an American nuclear-capable subsonic jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It has been operated by the United States Air Force (USAF) since 1955 and was flown by NASA from 1959 to 2007. The bomber can carry up to 70,000 pounds (32,000 kg) of weapons and has a typical combat range of around 8,800 miles without aerial refueling.

McDonald's Corporation is an American multinational fast food restaurant chain. Founded in 1940 as a restaurant operated by brothers Richard and Maurice McDonald in San Bernardino, California, the company has grown into one of the world's largest restaurant chains. At the end of 2025, the McDonald's system comprised 45,356 restaurants in more than 100 countries, approximately 95% of which were operated by franchisees.

On 15 April 1969, a United States Navy Lockheed EC-121M Warning Star of Fleet Air Reconnaissance Squadron One (VQ-1) on a reconnaissance mission was shot down by a North Korean MiG-21 aircraft over the Sea of Japan. The plane crashed 90 nautical miles (167 km) off the North Korean coast and all 31 Americans on board were killed, which constitutes the largest single loss of U.S. aircrew during the Cold War era.

The Cambodian Civil War was a civil war in Cambodia fought by the Khmer Rouge against the government of the Kingdom of Cambodia. Following the March 1970 coup, the conflict shifted as the Khmer Rouge and forces loyal to Norodom Sihanouk, now supported by North Vietnam and China, fought against the Khmer Republic, which was supported by the United States and South Vietnam.

The United States Air Force (USAF), Navy, and Marine Corps carried out air strikes, code-named Operation El Dorado Canyon, against Libya on 15 April 1986 in retaliation for the West Berlin discotheque bombing ten days earlier, which U.S. president Ronald Reagan blamed on Libyan leader Muammar Gaddafi. There were 40 reported Libyan casualties; one U.S. plane was shot down. One of the claimed Libyan deaths was of a baby girl, reported to be Gaddafi's daughter, Hana Gaddafi. However, there are doubts both as to whether she was really killed, or even if she truly existed.

The Hillsborough disaster was a fatal crowd crush at a football match at Hillsborough Stadium in Sheffield, South Yorkshire, England, on 15 April 1989. It occurred during an FA Cup semi-final between Liverpool and Nottingham Forest in the two standing-only central pens within the Leppings Lane stand allocated to Liverpool supporters. Shortly before kick-off, police match commander David Duckenfield ordered exit gate C to be opened in an attempt to ease crowding, which led to an influx of supporters entering the pens. This resulted in overcrowding of those pens and the fatal crush; with a total of 97 fatalities and 766 injuries, the disaster is the deadliest in British sporting history. Ninety-four people died on the day; one more died in hospital days later, and two more suffered irreversible brain damage on the day and died in 1993 and 2021 respectively. The match was abandoned and replayed at Old Trafford in Manchester on 7 May 1989; Liverpool won and went on to win that season's FA Cup.

Hu Yaobang was a Chinese politician who was a high-ranking official of the People's Republic of China. He held the top office of the Chinese Communist Party (CCP) from 1981 to 1987, first as Chairman from 1981 to 1982, then as General Secretary from 1982 to 1987. After the Cultural Revolution (1966–1976), Hu rose to prominence as a close ally of Deng Xiaoping, the paramount leader of China at the time.

The Marrakesh Agreement, manifested by the Marrakesh Declaration, was an agreement signed in Marrakesh, Morocco, by 123 nations on 15 April 1994, marking the culmination of the eight-year-long Uruguay Round and establishing the World Trade Organization, which officially came into being on 1 January 1995.

Air China Flight 129 (CCA129/CA129) was a scheduled international passenger flight, operated by Air China, from Beijing Capital International Airport to Gimhae International Airport in Busan. On 15 April 2002, the aircraft on this route, a Boeing 767, crashed into a hill named Mount Dotdae near Gimhae Airport, killing 129 of the 166 people on board.

The Boston Marathon bombing, sometimes referred to as simply the Boston bombing, was an Islamist domestic terrorist attack that took place during the 117th annual Boston Marathon on April 15, 2013. Four hours into the race, Tamerlan Tsarnaev and Dzhokhar Tsarnaev detonated two homemade pressure cooker bombs containing explosives and steel shrapnel. The bombs were hidden inside two backpacks dropped in the cheering crowds just minutes prior, and remotely detonated near the finish line of the race in central Boston, 14 seconds and 210 yards (190 m) apart. Three people were killed and hundreds were injured, including 12 victims who suffered traumatic limb amputations.

Notre-Dame de Paris, often referred to simply as Notre-Dame, is a medieval Catholic cathedral and basilica on the Île de la Cité, in the 4th arrondissement of Paris, France. It is the cathedral church of the Roman Catholic Archdiocese of Paris.

On April 15, 2021, a mass shooting occurred at a FedEx Ground facility in Indianapolis, Indiana, United States. Nineteen-year-old Brandon Scott Hole killed eight people and wounded four before committing suicide. Three others were injured by other causes. The Federal Bureau of Investigation (FBI) concluded that the shooting was "an act of suicidal murder" driven by Hole's desire to prove his masculinity and experience killing. It remains the deadliest mass shooting by a lone gunman in the history of Indiana.

On 15 April 2026, a school shooting occurred at the Ayser Çalık Secondary School in the Onikişubat district of Kahramanmaraş Province, Turkey. İsa Aras Mersinli, a 13-year-old student enrolled at the school, shot and killed 12 people and injured 13 more. Mersinli died from hypovolemic shock after sustaining a fatal knife injury while attempting to flee the scene.