July 11

Charles the Simple of France and Viking leader Rollo sign the Treaty of Saint-Clair-sur-Epte, granting Rollo territory that became Normandy.

Rollo, a Viking leader who had been raiding Frankish territory, agreed to accept Christianity and swear fealty to the French king in exchange for lands along the lower Seine River. The resulting territory became the Duchy of Normandy, whose descendants, including William the Conqueror, would later play a pivotal role in English history.

The young Baldwin IV becomes King of Jerusalem, with Raymond III of Tripoli serving as regent.

A coalition of Flemish militia, largely composed of common townspeople rather than professional soldiers, inflicted a stunning defeat on the heavily armored French royal cavalry near Kortrijk. The battle's name derives from the hundreds of gilded spurs collected from fallen French knights, and the victory became a lasting symbol of Flemish civic pride and resistance.

Flemish militia forces defeat the French royal army at the Battle of the Golden Spurs.

The Ming dynasty admiral set sail with an enormous fleet of treasure ships on the first of seven major maritime expeditions that reached as far as East Africa and the Arabian Peninsula. These voyages demonstrated remarkable Chinese naval and organizational capability decades before European age-of-exploration voyages, though China later curtailed such expeditions.

Chinese admiral Zheng He embarks on the first of his famous long-distance maritime expeditions.

Allied forces under the Duke of Marlborough and Prince Eugene of Savoy defeated a French army at Oudenarde in present-day Belgium, forcing the French into a costly retreat. The victory was among the most significant Allied successes of the War of the Spanish Succession, further diminishing French military prestige under Louis XIV.

Coalition forces under the Duke of Marlborough defeat French troops at the Battle of Oudenarde during the War of the Spanish Succession.

Political rivals and former allies, Vice President Burr and former Treasury Secretary Hamilton met at dawn in a duel stemming from years of personal and political animosity. Hamilton was mortally wounded and died the next day, and the killing effectively ended Burr's political career while cementing Hamilton's legacy as a founding statesman.

Aaron Burr mortally wounds Alexander Hamilton in their famous duel in Weehawken, New Jersey.

Built specifically for outdoor symphonic performances in the Hollywood Hills, the amphitheater opened with a sunrise concert and rapidly became a beloved Los Angeles cultural landmark. Its distinctive concentric-arc band shell has hosted countless orchestral, rock, and popular music performances over the following century, becoming an enduring symbol of the city's entertainment identity.

The Hollywood Bowl amphitheater opens to the public in Los Angeles.

Harper Lee's debut novel, exploring racial injustice in the Depression-era American South through the eyes of a young narrator, became an immediate critical and commercial success. It won the Pulitzer Prize the following year and has since become a staple of American literature curricula, celebrated for its moral clarity despite ongoing debates over its complex racial themes.

Harper Lee's novel "To Kill a Mockingbird" is first published in the United States.

America's first space station, launched in 1973, fell out of orbit and broke apart during re-entry after its decay was accelerated by unexpectedly high solar activity. Debris scattered harmlessly across the Indian Ocean and sparsely populated parts of Western Australia, and the uncontrolled reentry drew global media attention and some public anxiety in the weeks beforehand.

America's first space station, Skylab, disintegrates upon re-entering Earth's atmosphere, with debris scattered over the Indian Ocean and Australia.

The billionaire founder of Virgin Galactic flew aboard his company's own suborbital spaceplane, reaching the edge of space in a mission designed to test the vehicle ahead of planned commercial passenger flights. The flight intensified the emerging competition among wealthy entrepreneurs to pioneer private space tourism.

Richard Branson flies aboard Virgin Galactic's spaceplane, marking a milestone in commercial space tourism.

Following the death of his father, Amalric I, the thirteen-year-old Baldwin IV ascended to the throne of the Crusader Kingdom of Jerusalem despite suffering from leprosy, with the experienced noble Raymond III of Tripoli serving as regent during his minority. Baldwin later proved a capable military leader despite his illness before his early death.