During France's siege of the fortress of Pamplona, a cannonball struck and badly wounded a young Basque soldier named Íñigo López de Loyola, shattering one leg and injuring the other. Months of painful convalescence and religious reading transformed him; he abandoned his military ambitions and would go on to found the Society of Jesus in 1540, becoming known to history as Saint Ignatius of Loyola.

Observing the night sky from his garden, amateur astronomer William Herschel noticed a small disk that did not behave like a star. Initially he believed it was a comet, but continued observation revealed a near-circular orbit far beyond Saturn. The discovery doubled the known size of the solar system and made Herschel, a former musician, instantly famous, eventually earning him a royal pension from King George III.

Chief Justice John Marshall's Supreme Court ruled in Worcester v. Georgia that the state of Georgia could not extend its laws onto Cherokee Nation land, since only the federal government held authority to deal with Native nations. President Andrew Jackson refused to enforce the ruling, and within years the federal government forcibly removed the Cherokee and other southeastern tribes westward on the Trail of Tears.

Urbain Le Verrier, analyzing unexplained perturbations in Uranus's orbit, calculated the position of an unseen planet using pure mathematics rather than observation. His predictions, communicated to the Berlin Observatory, led astronomer Johann Galle to find Neptune within a degree of the forecast location later that year — a triumph often called 'the planet found by pen and paper.'

As revolutionary fervor swept across Europe following the fall of France's monarchy, protestors and students gathered outside Vienna's Landhaus demanding reform. Troops opened fire on the crowd, escalating the confrontation, and within a day Chancellor Klemens von Metternich — the dominant statesman of post-Napoleonic Europe — was forced to resign and flee the city in disguise, marking a symbolic collapse of the old conservative order.

Working at Lowell Observatory in Flagstaff, Arizona, self-taught astronomer Clyde Tombaugh spent months blink-comparing pairs of photographic plates searching for the hypothesized 'Planet X.' On plates from January 23 and 29, 1930, he spotted a faint point of light that shifted position — a new planet. The observatory announced the find on March 13, the anniversary of both Percival Lowell's birthday and Uranus's discovery, and the world celebrated a ninth planet, later reclassified as a dwarf planet in 2006.

Frustrated by the limitations of earlier electromechanical codebreaking devices, engineer Tommy Flowers at the Post Office Research Station championed a radically faster approach using vacuum tubes rather than relays. His design work in this period led to Colossus, operational by December 1943, which used some 1,600 thermionic valves to help Bletchley Park codebreakers crack the German Lorenz cipher used for high-level military communications.

Following the People Power Revolution that ended two decades of Ferdinand Marcos's rule in late February 1986, President Corazon Aquino's government pressed forward in mid-March with efforts to recover billions of dollars believed hidden by Marcos and his associates in foreign banks and shell companies, launching one of the largest asset-recovery campaigns in modern history.