On July 9, 1807, France, Russia, and Prussia signed the Second Treaty of Tilsit, bringing the War of the Fourth Coalition to an end. Following Napoleon Bonaparte's decisive victories, particularly at Friedland, Tsar Alexander I of Russia agreed to an alliance with France, while defeated Prussia was forced to surrender nearly half of its territory and accept harsh terms.

On July 9, 1745, two French ships carrying Bonnie Prince Charlie toward Scotland fought a fierce naval battle with the British warship HMS Lion. The French frigates Du Teillay and Elizabeth were transporting men, weapons, and supplies to support the Jacobite cause. After a bloody engagement that left 107 sailors dead on both sides, Du Teillay managed to escape and continue its mission, while the badly damaged Elizabeth was forced to return to France.

On July 9, 1790, the Swedish Navy, led by King Gustav III, won a stunning victory over the Russian Baltic Fleet at the Second Battle of Svensksund (Ruotsinsalmi) during the Russo-Swedish War. Fighting in the narrow coastal waters of the Gulf of Finland, Swedish forces used superior tactics and local knowledge to overwhelm the larger Russian fleet, capturing or destroying dozens of enemy vessels. It remains one of the largest naval battles ever fought in the Baltic Sea.

On July 9, 1737, Gian Gastone de' Medici, the last Grand Duke of Tuscany from the legendary Medici family, died at the age of 66. His death marked the end of the Medici dynasty, a ruling house that had shaped the politics, culture, and artistic achievements of Florence and Tuscany for nearly 300 years. The Medici family had been among the greatest patrons of the Renaissance, supporting masters such as Michelangelo, Leonardo da Vinci, and Botticelli.

On July 9, 1746, Philip V of Spain died at the Royal Palace of La Granja de San Ildefonso after a reign that transformed Spain’s monarchy. Born a grandson of King Louis XIV of France, Philip became king in 1700, sparking the War of the Spanish Succession, one of Europe’s greatest conflicts over the future of the Spanish throne.

Philip V’s reign marked the beginning of the Bourbon dynasty in Spain. He introduced major administrative reforms inspired by French models, strengthened royal authority, and worked to modernize Spain’s government and economy. His rule also saw the loss of many European territories through the Treaty of Utrecht, but Spain began a gradual recovery as a major power.

On July 9, 1701, during the opening stages of the War of the Spanish Succession, the Battle of Carpi was fought in northern Italy between a Bourbon army commanded by French Marshal Nicolas Catinat and a smaller Habsburg force led by Prince Eugene of Savoy. The clash marked one of the first significant encounters of the long European conflict over who would inherit the Spanish throne.

Despite being outnumbered, Prince Eugene’s Habsburg troops successfully pressured the French army, forcing Catinat to withdraw and giving the Austrians an important early advantage in Italy. The victory helped establish Eugene’s reputation as one of Europe’s greatest military commanders and set the stage for further battles between Bourbon and Habsburg forces.

On July 9, 1553, Maurice, Elector of Saxony, died at the age of 32 after being mortally wounded at the Battle of Sievershausen. A brilliant military commander and complex political figure, Maurice rose to prominence during one of the most turbulent periods of the Holy Roman Empire, marked by religious conflict between Catholics and Protestants.

Initially an ally of the Holy Roman Emperor Charles V, Maurice later turned against him and played a decisive role in the defeat of imperial forces during the uprising of Protestant princes in 1552. His actions helped secure the Peace of Passau, which paved the way for greater religious recognition of Lutheranism in the empire.

On July 9, 1553, as England stood on the brink of a succession crisis following the death of King Edward VI, Nicholas Ridley, Bishop of London, delivered a powerful sermon at St. Paul's Cross. Speaking before a large crowd, Ridley declared that Henry VIII's daughters, Mary and Elizabeth, were illegitimate and therefore had no lawful right to inherit the English crown. Instead, he urged support for Lady Jane Grey, whom Edward VI had named as his chosen successor.