March 20 in History

Albert Einstein published his general theory of relativity in November 1915, presenting the final field equations to the Prussian Academy of Sciences in Berlin on November 25. The paper described gravity not as a force acting between objects, as Newton had proposed, but as the curvature of spacetime caused by the presence of mass and energy. It was the most radical reconception of gravity since Newton published the Principia Mathematica in 1687. Born in Ulm, Germany on March 14, 1879, Einstein had already revolutionized physics once. His 1905 papers on special relativity, the photoelectric effect, and Brownian motion had established him as one of the leading physicists in the world. But special relativity applied only to objects moving at constant velocity. It said nothing about gravity or acceleration. Einstein spent ten years developing general relativity, wrestling with the mathematics of curved spacetime. The final equations, elegant and compact, described how mass tells spacetime how to curve and how curved spacetime tells objects how to move. The theory predicted phenomena that Newtonian gravity could not explain: the precise precession of Mercury's orbit, the bending of light around massive objects, and the expansion of the universe itself. The first major confirmation came during a total solar eclipse on May 29, 1919, when British astronomer Arthur Eddington measured the deflection of starlight passing near the Sun. The measurements matched Einstein's predictions. The results, announced at a joint meeting of the Royal Society and the Royal Astronomical Society in London, made front-page news worldwide. Einstein became the most famous scientist on earth overnight. General relativity has since been confirmed by every experimental test, including the detection of gravitational waves by LIGO in 2015, exactly one hundred years after the theory was published. GPS satellites must account for relativistic time dilation to maintain accuracy. The theory remains the foundation of modern cosmology, describing black holes, the Big Bang, and the large-scale structure of the universe.

Five Swedish noblemen were publicly beheaded in Linkoping on Maundy Thursday, executed by Duke Charles for supporting King Sigismund during the civil war over Sweden's throne and religious direction. The mass execution crushed Catholic opposition and consolidated Protestant rule, clearing the path for Charles to eventually claim the crown as Charles IX. The Linkoping Bloodbath of March 20, 1600, was the culmination of the War against Sigismund, a conflict rooted in the religious divide between Protestant Sweden and its Catholic king. Sigismund III Vasa had inherited both the Swedish and Polish thrones, attempting to govern Sweden from Warsaw while reimposing Catholicism on a country that had been Protestant for over sixty years. Duke Charles, Sigismund's uncle, positioned himself as the defender of Swedish Protestantism and Swedish sovereignty, rallying the nobility and the riksdag against the absent king. The military phase of the conflict ended with Sigismund's defeat at the Battle of Stangebro in 1598, but several powerful noble families continued to support his claim. Charles arrested the dissenting nobles and put them on trial before a hand-picked tribunal that convicted them of treason. The five men beheaded in Linkoping's main square on Maundy Thursday included Erik Sparre, one of Sweden's highest-ranking officials, and Gustav Banér, whose family had been prominent in Swedish politics for generations. The public executions sent a message that opposition to Charles was fatal. The Bloodbath eliminated the Catholic faction from Swedish politics, secured the Protestant Reformation permanently, and cleared Charles's path to the throne, which he claimed as Charles IX in 1604. His grandson would be Gustavus Adolphus, the "Lion of the North" who became Protestantism's greatest military champion during the Thirty Years' War.

Federal marshals captured Jamil Abdullah Al-Amin, formerly known as H. Rap Brown of the Black Panthers, on March 20, 2000, after a manhunt that followed the shooting death of Fulton County Sheriff's Deputy Ricky Kinchen and the wounding of Deputy Aldranon English outside Al-Amin's grocery store in Atlanta four days earlier. Born Hubert Gerold Brown on October 4, 1943, in Baton Rouge, Louisiana, he had been one of the most incendiary figures of the 1960s Black Power movement. As chairman of the Student Nonviolent Coordinating Committee from 1967 to 1968, he earned the nickname "Rap" for his fiery rhetoric and was famously quoted as saying that "violence is as American as cherry pie." He was arrested multiple times for inciting riots and fled the country in 1970, spending time in Africa before converting to Sunni Islam and changing his name. He settled in Atlanta in the 1970s and became a community leader and imam, running a grocery store in the West End neighborhood. His followers described him as a reformed man who had turned from revolution to religion. The shooting of the two deputies in March 2000 shattered that narrative. Al-Amin fled but was captured four days later in a rural Alabama town. His trial in 2002 ended in conviction for murder and aggravated assault. He was sentenced to life in prison without parole. The case provoked intense debate about whether his prosecution was just or politically motivated, with supporters arguing that he had been targeted by federal surveillance for decades and critics pointing to the physical evidence and witness testimony. He remains imprisoned. His conviction closed a turbulent chapter that spanned from 1960s Black Power activism to religious transformation and ultimately to violent crime.

Five noblemen were beheaded in Linkoping's main square on Maundy Thursday, the day Christians commemorate Jesus washing his disciples' feet as an act of humility and forgiveness. King Sigismund's supporters had backed the wrong side in Sweden's civil war, and Duke Karl, soon to be King Charles IX, wanted everyone in the kingdom to remember the cost of opposing him. The executions started at dawn on March 20, 1600. Four counts and one baron knelt on the scaffold before noon. Karl had promised the accused a fair trial, but the court was packed with his own loyalists, the charges were predetermined, and the sentences were never in doubt. What made the Linkoping Bloodbath particularly calculated was Karl's insistence that the condemned nobles' families be present to watch. He constructed wooden viewing platforms specifically for that purpose, forcing wives and children to witness the executions from an elevated position where they couldn't look away. The message wasn't subtle: oppose the duke, and your family watches you die on the holiest day of mercy in the Christian calendar. Karl secured his throne through the bloodbath, but it earned him a reputation for deliberate cruelty that haunted the Vasa dynasty for generations. His own son, the legendary Gustav II Adolf, spent much of his early reign trying to repair the political damage his father's brutality had caused with the Swedish nobility. The most ruthless political purge in Swedish history happened on a day specifically reserved for washing the feet of those who betrayed you.

Thirteen years in the Tower of London, and James I didn't pardon him. He just let him out to hunt for gold. Sir Walter Raleigh, once the most favored courtier in Elizabeth I's court, had been convicted of treason in 1603 in a trial so procedurally corrupt that even the judges appeared uncomfortable with the verdict. The evidence was thin: a single witness who later recanted, and suspicions of involvement in a Spanish-backed plot to overthrow James. Raleigh spent thirteen years in the Tower's Bloody Tower, which he transformed into something between a laboratory and a library, conducting chemical experiments, writing his massive "History of the World," and entertaining visitors who included Prince Henry, the heir apparent, who admired him greatly. Henry's death in 1612 removed Raleigh's most powerful protector. But James I needed money, and Raleigh had spent years promising that he knew the location of a vast gold mine on the Orinoco River in South America. The king's deal was transactional: find El Dorado, fill the royal coffers, avoid any conflict with Spanish colonies, and maybe you live. Raleigh sailed in 1617 with a fleet of fourteen ships. He was 64, half-broken by imprisonment, and suffering from recurring fevers. His son Wat was killed in a skirmish with Spanish forces at San Thome, directly violating James's prohibition on attacking Spanish interests. Raleigh returned to England empty-handed in 1618. Spain's ambassador demanded his head, and James, desperate for a Spanish marriage alliance for his remaining son, simply reactivated the original death sentence from 1603. Raleigh was beheaded at Westminster on October 29, 1618. The pardon he'd been working toward for fifteen years never actually existed.

The government auctioned off land that people already lived on. In 1903, Argentina's administration carved up 8.5 million acres of southern Patagonia into lots for wealthy buyers, ignoring the squatters and small ranchers who'd worked those windswept plains for decades. Families who'd survived brutal winters and built modest flocks watched strangers from Buenos Aires purchase their homes out from under them. The auctions created an oligarchy of absentee landlords—some lots exceeded 250,000 acres—while displacing the very people who'd proven the land could sustain life. Within two years, violent labor strikes erupted as displaced workers faced impossible conditions on estates owned by men who'd never felt Patagonian wind. The auctions didn't settle the frontier; they ignited it.

He'd already rewritten physics once, but Einstein wasn't satisfied. Nine years after special relativity made him famous, he submitted an even wilder idea to Annalen der Physik: gravity wasn't a force pulling objects together—it was the warping of space and time itself. The math was so complex it took him nearly a decade to work out, collaborating with mathematician Marcel Grossmann just to develop the tensor calculus he needed. Three years later, Arthur Eddington's eclipse expedition would prove Einstein right by measuring how the sun bent starlight. But here's what's strange: Einstein's equations predicted something so bizarre he didn't believe it himself—black holes, regions where spacetime curves so violently that not even light escapes. He spent years trying to prove they couldn't exist.

They voted in 1,510 separate districts, and somehow 98% of eligible voters showed up. The Upper Silesia plebiscite wasn't just about drawing lines on a map—it was three million people deciding whether they'd wake up German or Polish, with their jobs, property rights, and children's futures hanging on the outcome. The region held 75% of Germany's zinc and lead production. When results showed 60% favored Germany but most industrial towns voted Polish, the League of Nations faced an impossible task: how do you split a place that only works as one? They drew a border that satisfied no one, sparked armed uprisings within months, and proved that letting people vote doesn't mean they'll accept the answer.

The woman who brought Picasso to America wasn't a museum director or art dealer—she was a socialite named Rue Winterbotham Carpenter who'd bought his drawings directly from his Paris studio for $30 each. The Arts Club of Chicago displayed 32 of his works in January 1923, beating New York's elite institutions by years. Chicago's newspapers called them "diseased," "insane," and "an insult to womanhood." But Carpenter didn't flinch. She'd already calculated that Midwestern industrialists with new money were braver than East Coast collectors with reputations to protect. She was right—within a decade, Chicago's Art Institute would house one of America's finest modern collections, all because a society woman decided the provinces didn't need permission from the coasts.

Chiang Kai-shek invited Communist officers to a banquet in Guangzhou, then arrested them at gunpoint. March 20, 1926. His "Zhongshan Incident" wasn't about ideology—a warship had moved without his permission, and he suspected Soviet advisors were plotting a coup. He detained 50 Russians and executed the ship's captain. The Soviets backed down completely, giving Chiang exactly what he wanted: control of the army while keeping Moscow's money and weapons flowing. For another year, Communists and Nationalists kept pretending they were allies, even as Chiang systematically removed his future enemies from command positions. The dress rehearsal worked so well he'd repeat it nationwide in 1927, this time killing thousands.

The first concentration camp wasn't Hitler's idea—it was a 32-year-old chicken farmer turned police chief. Heinrich Himmler, just weeks into running Munich's police force, commandeered an abandoned munitions factory in Dachau to hold 5,000 political prisoners. He appointed Theodor Eicke, a volatile SS officer recently released from a psychiatric clinic, as commandant. Eicke created the brutal template: systematic dehumanization, guard training manuals, punishment protocols. Within a year, he'd export his "Dachau model" to camps across Germany. The administrative efficiency of genocide didn't emerge from some grand plan—it was workshopped by an unstable middle manager in Bavaria, then franchised.