July 20 in History

Sitting Bull rode into Fort Buford in the Dakota Territory on July 20, 1881, gaunt and weary after four years of exile in Canada. The Hunkpapa Lakota chief who had orchestrated the greatest Native American military victory in history handed his Winchester rifle to his young son Crow Foot, who presented it to the commanding officer, symbolizing the end of armed Sioux resistance. Five years earlier, Sitting Bull had been the spiritual leader who unified thousands of Lakota, Cheyenne, and Arapaho warriors at the Little Bighorn. His vision of soldiers falling upside down into the camp had galvanized the confederation before they annihilated George Armstrong Custer's 7th Cavalry on June 25, 1876. The stunning victory sealed Sitting Bull's legend but also ensured the full fury of the United States military would pursue his people relentlessly. After Little Bighorn, the army launched a winter campaign of extraordinary brutality, attacking villages, destroying food stores, and killing horses to force the Sioux onto reservations. Sitting Bull led his band of roughly a thousand followers across the border into Canada, settling near Wood Mountain in what is now Saskatchewan. The Canadian government under Queen Victoria tolerated their presence but refused to provide rations or a permanent reservation. By 1881, the buffalo herds that had sustained Plains Indian life for millennia were functionally extinct. Sitting Bull's people were starving. One by one, families slipped back across the border to surrender. When Sitting Bull finally followed with his last 186 followers, he was among the last free Lakota leaders on the continent. The government confined Sitting Bull at Standing Rock Reservation, where he remained a figure of enormous symbolic power. Nine years after his surrender, reservation police shot and killed him during an attempt to arrest him in connection with the Ghost Dance movement, just two weeks before the massacre at Wounded Knee.

Colonel Claus von Stauffenberg placed a briefcase containing two pounds of plastic explosive under a conference table at the Wolf's Lair, Adolf Hitler's East Prussian headquarters, on July 20, 1944. The resulting blast killed four men and wounded twenty others, but Hitler survived with only minor injuries, and the conspiracy to overthrow the Nazi regime collapsed within hours. Stauffenberg, a decorated aristocratic officer who had lost an eye, his right hand, and two fingers on his left hand in North Africa, had concluded by 1943 that Hitler was leading Germany to total destruction. He joined a network of military officers, diplomats, and civilians plotting to kill Hitler, seize control of the government, and negotiate peace with the Western Allies. The conspirators planned to use Operation Valkyrie, the army's contingency plan for maintaining order during a domestic emergency, as the mechanism for their coup. Stauffenberg armed the bomb in a bathroom before the briefing, but managed to prepare only one of two charges due to an interruption. He placed the briefcase near Hitler and excused himself from the room. After the explosion, he saw the building's wreckage and flew to Berlin convinced Hitler was dead. But Colonel Heinz Brandt, seated next to the briefcase, had unknowingly moved it behind a thick oak table leg, which shielded Hitler from the worst of the blast. The conspirators in Berlin hesitated for critical hours, waiting for confirmation of Hitler's death before activating Valkyrie. When it became clear Hitler had survived, loyalist officers arrested Stauffenberg and three co-conspirators at the War Ministry. General Friedrich Fromm, desperate to cover his own knowledge of the plot, had them executed by firing squad in the courtyard that same night. Stauffenberg's last words were "Long live holy Germany." Hitler's retribution was savage. The Gestapo arrested approximately 7,000 people and executed nearly 5,000 over the following months, including field marshals, generals, and former ambassadors, many by slow strangulation with piano wire while cameras filmed their deaths.

Neil Armstrong stepped off a ladder and pressed his boot into the lunar dust at 10:56 p.m. Eastern Time on July 20, 1969, becoming the first human being to stand on another world. Six hundred million people watched the grainy television transmission live, the largest audience for any single event in history up to that point. Apollo 11 launched from Kennedy Space Center four days earlier atop a Saturn V rocket, the most powerful machine ever built. Armstrong, Buzz Aldrin, and Michael Collins rode 363 feet of controlled explosion into Earth orbit, then fired toward the Moon at 25,000 miles per hour. Collins remained in lunar orbit aboard the command module Columbia while Armstrong and Aldrin descended to the surface in the lunar module Eagle. The final minutes of descent nearly ended in disaster. Armstrong realized the computer was guiding Eagle toward a boulder-strewn crater and took manual control, skimming over the hazard while fuel ran critically low. Mission Control fell silent as the fuel gauge dropped below sixty seconds of hover time. When Aldrin called out "Contact light," indicating the landing probes had touched the surface, controllers erupted. Armstrong's first transmission from the Moon was characteristically understated: "Houston, Tranquility Base here. The Eagle has landed." Armstrong and Aldrin spent roughly two and a half hours outside the spacecraft, planting an American flag, collecting 47.5 pounds of rock and soil samples, and deploying scientific instruments. They spoke by telephone with President Nixon, took photographs that became defining images of the twentieth century, and bounded across the surface in the one-sixth gravity. Collins, orbiting alone above them, later described himself as "not the least bit lonely" despite being the most isolated human in existence. The crew splashed down in the Pacific Ocean on July 24 and spent three weeks in quarantine. Apollo 11 fulfilled President Kennedy's 1961 challenge to land a man on the Moon before the decade ended, and it did so with five months to spare.

Criollo merchants and intellectuals in Bogota provoked a carefully planned confrontation with Spanish authorities on July 20, 1810, triggering a revolution that would eventually liberate one of South America's largest territories. The immediate spark was absurdly mundane: a dispute over borrowing a flower vase from a Spanish shopkeeper. The crisis was anything but accidental. Criollos, people of Spanish descent born in the Americas, had watched Napoleon's 1808 invasion of Spain with a mixture of alarm and opportunity. With the Spanish king imprisoned in France and a puppet regime in Madrid, colonial authority across Latin America suddenly lacked legitimacy. Juntas had already formed in Caracas, Buenos Aires, and other cities, and Bogota's educated elite determined to follow. On the morning of July 20, a group of conspirators sent Luis de Rubio to the shop of Spaniard Jose Gonzalez Llorente to borrow a vase, knowing the request would likely be refused and could be used to provoke a public incident. When Llorente declined, criollo agitators whipped up a crowd in the main plaza. The confrontation escalated rapidly, and by evening the Spanish viceroy had been forced to accept a governing junta composed of prominent local citizens. The Junta Suprema de Santa Fe initially claimed loyalty to the imprisoned Spanish king Ferdinand VII while effectively governing independently. This half-measure reflected deep divisions within the independence movement between those seeking full separation from Spain and moderates who envisioned greater autonomy within the Spanish empire. The resulting political instability led to years of civil conflict known as the Patria Boba, or Foolish Fatherland. Spain reconquered New Granada in 1816 under the brutal general Pablo Morillo, executing dozens of independence leaders. Full liberation came only after Simon Bolivar's forces won the decisive Battle of Boyaca in August 1819, establishing the Republic of Gran Colombia. July 20 is celebrated today as Colombia's Independence Day.

Harry Gold stood in a Philadelphia courtroom on July 20, 1950, and pleaded guilty to espionage, confirming the existence of a Soviet spy ring that had penetrated the most secret project in American history. His confession unraveled a network that had passed atomic bomb secrets to Moscow and sent shockwaves through a nation already gripped by Cold War paranoia. Gold, a quiet, pudgy chemist from Philadelphia, had been recruited by Soviet intelligence in 1935 and spent fifteen years as a courier, shuttling scientific and industrial secrets from American sources to Soviet handlers. His most consequential assignment came in 1945, when he traveled to Los Alamos, New Mexico, to collect detailed technical drawings of the plutonium implosion bomb from Klaus Fuchs, a German-born British physicist working on the Manhattan Project. The FBI caught Fuchs first. British intelligence identified him in 1949 after the Venona project, which decrypted Soviet diplomatic cables, revealed a spy code-named "Charles" operating inside Los Alamos. Fuchs confessed in January 1950 and described his American courier in enough detail for agents to identify Gold. When FBI agents arrived at Gold's Philadelphia apartment, they found a map of Santa Fe hidden behind a bookcase, and Gold quickly broke down. Gold's testimony did not stop with Fuchs. He revealed that on the same 1945 trip to New Mexico, he had also collected espionage material from David Greenglass, a machinist at Los Alamos. Greenglass, facing prosecution, implicated his sister Ethel Rosenberg and her husband Julius as the organizers of the ring. The chain of confessions and accusations led directly to the Rosenberg trial, the most sensational espionage case of the Cold War. Gold received a thirty-year sentence. The Rosenbergs, convicted of conspiracy to commit espionage, were executed in 1953. The case fueled Senator Joseph McCarthy's anti-communist crusade and shaped American politics for a generation.

He proved the scientists wrong by doing it. The physics establishment had calculated that radio waves, traveling in straight lines, couldn't curve over the horizon. Guglielmo Marconi ignored this and transmitted a Morse code signal from Cornwall to Newfoundland in 1901, covering about 3,500 kilometers across the Atlantic. He was right because the ionosphere bounces radio waves in ways nobody had modeled yet. Born in Bologna in 1874 to an Italian father and an Irish mother, Marconi began experimenting with Hertzian waves as a teenager in his family's attic. The Italian government showed no interest, so his mother arranged introductions in England, where the British Post Office recognized the commercial potential immediately. He founded the Wireless Telegraph and Signal Company in 1897 and spent the next decade building a global communications network. His equipment saved hundreds of lives during the Titanic disaster in 1912, when wireless operators transmitted distress signals that brought the Carpathia to rescue over seven hundred survivors. He won the Nobel Prize in Physics in 1909, sharing it with Karl Ferdinand Braun. During the 1920s and 1930s he experimented with shortwave and microwave radio, pushing the technology toward the radar and television systems that would emerge after his death. He died in Rome on July 20, 1937, at sixty-three. Radio operators around the world went silent for two minutes in his honor. Every device in your house that broadcasts without a wire is his inheritance.