September 10

John the Fearless, Duke of Burgundy, is assassinated by supporters of the future French king, deepening France's civil conflict.

John the Fearless was ambushed and killed during a supposed peace meeting with the Dauphin, the future Charles VII, an assassination carried out in revenge for John's own earlier murder of a royal rival. The killing deepened the bitter civil conflict between rival French factions and pushed Burgundy into a formal alliance with England during the ongoing Hundred Years' War.

A major earthquake strikes Constantinople, causing such widespread destruction it becomes known as "The Lesser Judgment Day."

A severe earthquake struck the Ottoman capital, causing catastrophic damage to buildings including mosques and the city walls, and reportedly triggering a destructive tsunami as well. Contemporary chroniclers gave the disaster its ominous nickname due to the sheer scale of destruction and loss of life across the densely populated imperial city.

English forces defeat the Scots at the Battle of Pinkie, the last full-scale military engagement between England and Scotland.

English forces decisively defeated an invading Scottish army near the village of Pinkie, inflicting heavy casualties in what became known as "Black Saturday" in Scotland. The battle proved to be the final large-scale pitched battle fought between the two kingdoms, though border skirmishes continued intermittently for decades afterward.

Nathan Hale volunteers to serve as a spy for the Continental Army.

The young schoolteacher-turned-soldier volunteered for a dangerous intelligence-gathering mission behind British lines in New York, reportedly declaring that he regretted having only one life to lose for his country. He was captured and executed by the British shortly afterward, becoming one of the American Revolution's most celebrated martyrs.

American naval forces defeat the British fleet at the Battle of Lake Erie during the War of 1812.

American naval forces under Commodore Oliver Hazard Perry defeated a British squadron on Lake Erie, securing American control of the crucial lake and enabling the recapture of Detroit shortly afterward. Perry's after-battle report, "We have met the enemy and they are ours," became one of the most famous phrases of the war.

Elias Howe receives a patent for his design of the sewing machine.

Inventor Elias Howe secured a patent for his design of a lockstitch sewing machine, featuring an eye-pointed needle and a mechanism for producing durable, even stitches far faster than hand sewing. Though Howe initially struggled to find buyers, his invention eventually became foundational to the industrialization of clothing manufacturing worldwide.

Empress Elisabeth of Austria is assassinated by an Italian anarchist in Geneva.

While walking near Lake Geneva, the Austrian empress consort, known for her beauty and eccentric personal habits, was fatally stabbed by an Italian anarchist seeking to assassinate any member of royalty as a political statement. Her death shocked European royal circles and deeply affected her husband, Emperor Franz Joseph I, who outlived nearly his entire immediate family.

New York City's municipally owned IND subway system opens to the public.

New York City's third subway system, built and operated directly by the municipal government rather than private companies, opened its first line, part of a broader effort to expand affordable public transit and reduce the city's reliance on privately operated transit monopolies.

British contestant Charles Ingram is later found to have won a game show's top prize through fraud, in a case that captivated public attention.

British contestant Charles Ingram won the top prize on the game show "Who Wants to Be a Millionaire?" but was later found to have used a coded coughing system with accomplices in the audience to identify correct answers, a scandal that became a widely publicized case study in game show fraud.

The Large Hadron Collider is activated for the first time at CERN in Switzerland.

Physicists at the CERN research facility near Geneva successfully powered up the Large Hadron Collider, the world's largest and most powerful particle accelerator, designed to probe fundamental questions in physics including the search for the theorized Higgs boson particle, which was confirmed discovered several years later.