July 24

Roger II of Sicily defeats rival forces at the Battle of Nocera, consolidating his control over southern Italy.

Norman ruler Roger II defeated a coalition of rebellious vassals and allied forces at Nocera in southern Italy, a victory that helped consolidate his control over the mainland territories that, combined with Sicily, formed the foundation of the Norman Kingdom of Sicily.

King Edward I of England captures Stirling Castle using a massive siege engine known as the War Wolf.

During the First War of Scottish Independence, English King Edward I's forces finally captured the strategically vital Stirling Castle after a prolonged siege, employing a massive and technologically impressive trebuchet nicknamed the "War Wolf" that the king reportedly insisted on using even after the garrison offered to surrender.

King Edward I of England captured Stirling Castle after a prolonged siege, using a massive trebuchet nicknamed 'Warwolf.'

The huge siege engine, built specially for the assault, was so devastating that the Scottish garrison reportedly tried to surrender before it was even used, though Edward insisted on firing it anyway to demonstrate its power. The castle's fall gave England control of a key strategic stronghold during the Wars of Scottish Independence. Stirling was later recaptured by the Scots following Robert the Bruce's victory at nearby Bannockburn a decade afterward.

The Battle of Harlaw, one of the bloodiest battles in Scottish history, was fought between Highland and Lowland Scottish forces near Aberdeenshire.

The clash arose from a succession dispute over the Earldom of Ross, pitting Donald, Lord of the Isles, and his Highland army against forces loyal to the Duke of Albany and the Lowland nobility. Though neither side achieved a decisive tactical victory, the battle halted the Highland advance and became remembered in Scottish folklore as 'Red Harlaw' for its heavy casualties. It remains one of the most storied conflicts in medieval Scottish history.

French explorer Jacques Cartier plants a cross on the Gaspe Peninsula, formally claiming the territory for France.

During his voyage exploring the Gulf of Saint Lawrence, French explorer Jacques Cartier erected a large cross on the Gaspe Peninsula bearing the arms of the French king, formally claiming the territory for France and initiating the long history of French colonial presence in what became Canada.

Mary, Queen of Scots is forced to abdicate the Scottish throne in favor of her infant son, James VI.

Facing a rebellion by Protestant Scottish nobles following scandal and the suspicious death of her second husband, Mary, Queen of Scots was forced to abdicate her throne in favor of her thirteen-month-old son, who was crowned James VI and later became James I of England as well.

Mary, Queen of Scots was forced to abdicate the Scottish throne in favor of her infant son, who became James VI.

Mary had been imprisoned by rebellious Scottish nobles following the scandal surrounding the murder of her husband, Lord Darnley, and her subsequent marriage to a man widely suspected of the killing. Her one-year-old son was crowned king while her half-brother, the Earl of Moray, governed as regent. James VI later inherited the English throne as well in 1603, uniting the two crowns as James I of England.

French explorer Antoine de la Mothe Cadillac founds Fort Pontchartrain, the settlement that grew into the city of Detroit.

French explorer and colonial administrator Antoine de la Mothe Cadillac established a fortified settlement along the Detroit River as part of France's effort to control trade routes and counter British expansion in the Great Lakes region. The outpost gradually grew into the major American industrial city of Detroit.

Brigham Young leads Mormon pioneers into the Salt Lake Valley, founding what became Salt Lake City.

After being driven from Illinois due to religious persecution, Brigham Young led a large group of Latter-day Saint pioneers into the arid Salt Lake Valley, where he reportedly declared it the right place for their new settlement. The community rapidly developed into a significant regional center and eventually the capital of Utah.

American explorer Hiram Bingham III brings the ruins of Machu Picchu to international attention, later popularly described as its rediscovery.

American explorer and Yale professor Hiram Bingham III, guided by local farmers, visited the overgrown ruins of the Inca citadel Machu Picchu and subsequently publicized the site internationally through detailed expeditions and photography, bringing global attention to what remains one of the most iconic archaeological sites in South America.

American explorer Hiram Bingham was led to the ruins of Machu Picchu, the ancient Inca city high in the Peruvian Andes.

Bingham, a Yale University lecturer searching for the lost Inca city of Vilcabamba, was guided to the overgrown site by a local farmer, though the ruins were already known to some local residents at the time. His subsequent expeditions and writings brought Machu Picchu to international fame as one of the most remarkable archaeological sites in the Americas. The site is now a UNESCO World Heritage Site and one of South America's most visited tourist destinations.

The League of Nations formally approved the British Mandate for Palestine, placing the territory under British administration.

The mandate incorporated the earlier Balfour Declaration's commitment to establishing a 'national home for the Jewish people' in Palestine while also pledging to protect the rights of the existing Arab population. Britain administered the territory for the next 25 years, navigating escalating tensions between Jewish and Arab communities. The mandate's unresolved contradictions contributed to decades of conflict that followed Britain's eventual withdrawal in 1948.

The Menin Gate memorial to the missing was dedicated at Ypres, Belgium, honoring British and Commonwealth soldiers who died in the First World War with no known grave.

The monumental arch, built on one of the main routes soldiers took toward the front lines, bears the names of more than 54,000 men who died in the Ypres Salient before August 1917 and have no known grave. Since 1928, buglers have sounded the Last Post beneath the gate every evening as an act of remembrance, a tradition that continues today aside from a pause during German occupation in the Second World War. The memorial remains one of the most significant British war memorials on the Western Front.

The Royal Air Force launched Operation Gomorrah, a devastating bombing campaign against Hamburg, beginning with a massive night raid.

British and Canadian bombers struck the German port city at night while American forces bombed by day, over about a week, creating a firestorm that killed more than 30,000 people and destroyed much of the city. It was among the most destructive air campaigns of the Second World War, demonstrating the devastating potential of concentrated incendiary bombing. The raid's scale shocked German leadership and influenced later Allied bombing strategy against other cities.

The Apollo 11 spacecraft splashes down safely in the Pacific Ocean, completing the first crewed Moon landing mission.

The Apollo 11 command module Columbia splashed down safely in the Pacific Ocean, successfully concluding the historic mission that had achieved humanity's first crewed lunar landing days earlier. The returning astronauts were immediately placed in quarantine as a precaution against potential lunar contaminants before their triumphant public reception.

The U.S. Supreme Court unanimously rules that President Nixon must surrender the Watergate tapes to prosecutors.

In a unanimous ruling addressing the ongoing Watergate scandal, the U.S. Supreme Court determined that executive privilege did not permit President Nixon to withhold subpoenaed White House tape recordings from prosecutors. The decision proved instrumental in bringing about Nixon's resignation just weeks later.

The US Supreme Court unanimously ruled that President Richard Nixon must turn over secret White House tape recordings to Watergate prosecutors.

The recordings ultimately revealed Nixon's direct involvement in covering up the break-in at the Democratic National Committee's headquarters at the Watergate complex two years earlier. The ruling rejected Nixon's claim of executive privilege and set a lasting precedent limiting presidential power to withhold evidence in criminal proceedings. Facing near-certain impeachment after the tapes' release, Nixon resigned from office less than three weeks later.

A high-speed passenger train derailed while traveling far above the speed limit near Santiago de Compostela, Spain, killing 78 people.

The train left the tracks on a sharp curve just outside the city, with several carriages overturning and catching fire in one of Spain's deadliest rail disasters. Investigators determined that the driver had been traveling at more than twice the curve's speed limit while distracted by a phone call. The disaster prompted a major review of rail safety systems and driver oversight across Spain's high-speed rail network.

Boris Johnson becomes Prime Minister of the United Kingdom.

Following a decisive Conservative Party leadership contest, Boris Johnson formally became Prime Minister of the United Kingdom, inheriting the unresolved and contentious task of implementing Britain's withdrawal from the European Union after his predecessor's efforts had repeatedly stalled in Parliament.

Boris Johnson became Prime Minister of the United Kingdom after winning the Conservative Party leadership contest.

Johnson succeeded Theresa May, who resigned after failing to secure parliamentary approval for her Brexit withdrawal agreement. His premiership was defined by delivering Britain's departure from the European Union, along with the government's response to the COVID-19 pandemic that followed shortly after. Johnson led the Conservatives to a large majority in the December 2019 general election before resigning in 2022 amid a series of political controversies.