July 9

The Old Swiss Confederacy decisively defeats the Duchy of Austria at the Battle of Sempach.

Henry VIII secured an annulment of his brief marriage to Anne of Cleves, arranged for political alliance purposes, on grounds that it had never been consummated. Anne accepted the settlement gracefully, receiving generous property and the title "the King's Beloved Sister," allowing her to live comfortably in England for the rest of her life, unlike several of Henry's other wives.

King Henry VIII has his marriage to Anne of Cleves, his fourth wife, formally annulled.

Catherine, a German-born princess married into the Russian royal family, orchestrated a coup with the support of the imperial guard that deposed her unpopular husband, Peter III, who was killed in custody shortly afterward. Catherine's subsequent 34-year reign became one of the most transformative in Russian history, expanding the empire's territory and embracing Enlightenment ideals.

Catherine the Great becomes Empress of Russia following a coup that deposed her husband, Peter III.

Washington ordered the newly adopted Declaration of Independence read to assembled troops in New York as British forces gathered nearby in preparation for the New York campaign. The reading was followed by celebratory unrest in which soldiers and citizens toppled a statue of King George III, later melted down to make musket balls.

George Washington orders the Declaration of Independence read aloud to Continental Army troops assembled in Manhattan.

Argentina's congress formally declared independence from Spain at a gathering in Tucuman, following years of revolutionary struggle that began in 1810. The declaration solidified the political break from colonial rule, though military conflict with Spanish royalist forces continued in the region for several more years before independence was fully secured.

Argentina formally declares independence from Spanish colonial rule.

After a lengthy Union siege along the Mississippi River in Louisiana, Confederate forces at Port Hudson surrendered upon learning of the fall of Vicksburg days earlier, since further resistance had become strategically pointless. The surrender gave the Union complete control of the Mississippi River, severing the Confederacy's eastern and western territories.

The Siege of Port Hudson ends in Union victory, securing full Union control of the Mississippi River.

Held on the grounds of the All England Club, the inaugural Wimbledon tournament featured a men's singles competition won by Spencer Gore. What began as a modest gentlemen's club event grew into the oldest and among the most prestigious tennis championships in the world, still played annually on the club's grass courts.

The first Wimbledon Championships tennis tournament begins in England.

Allied forces launched a massive amphibious assault on Sicily, codenamed Operation Husky, marking the first major Allied invasion of Axis-held European territory. The campaign's success contributed directly to the collapse of confidence in Mussolini's fascist government, leading to his removal from power by King Victor Emmanuel III later that month.

Allied forces launch the invasion of Sicily, an operation that ultimately leads to the downfall of Benito Mussolini's regime.

After a referendum overwhelmingly favoring separation, South Sudan formally became the world's newest sovereign nation, ending decades of civil war with Sudan that had claimed millions of lives. The new country soon faced significant challenges, including internal ethnic conflict and economic hardship, complicating its transition to stable statehood.

The African Union is established in Addis Ababa, replacing the Organisation of African Unity.

Fifty-three African heads of state gathered in Ethiopia's capital to formally launch the African Union, succeeding the Organisation of African Unity with an expanded mandate covering economic integration, peacekeeping, and human rights. The new body was modeled partly on the European Union's institutional structure, aiming for deeper continental cooperation.

South Sudan gains independence from Sudan, becoming the world's newest nation at the time.

Confederate soldiers of the Old Swiss Confederacy inflicted a stunning defeat on the heavily armored knights of Habsburg Austria near Sempach, with Duke Leopold III of Austria killed in the fighting. The battle became a foundational moment in Swiss national identity, celebrated as an early triumph of citizen infantry over feudal cavalry.