May 31 moves from the dark waters of Sydney Harbour to a treaty table in South Africa, from the golden temples of ancient Egypt to the Belfast shipyard where Titanic first touched water, and finally to Greenwood, Tulsa, where prosperity was met with organized racial violence.
It is a date about visibility and memory: war becoming visible in a harbor, empire writing peace on paper, a pharaoh building himself into stone, an ocean liner entering public imagination, and a community fighting to recover a history long suppressed.
- In 1942, Japanese midget submarines attacked Sydney Harbour.
- In 1902, the Treaty of Vereeniging ended the Second Boer War.
- In a reconstructed Egyptian chronology, May 31 also marks the accession of Ramesses II, one of the most famous pharaohs in ancient history.
For anyone asking what happened on May 31, this date connects World War II, imperial conflict, ancient Egypt, maritime engineering, and American historical memory. Today in History May 31 shows that history is not only made by what happens in public view, but also by what later generations choose to uncover, remember, and confront.
Major Events on May 31
1942 | Japanese Midget Submarines Attack Sydney Harbour
In Sydney Harbour, the Pacific War arrived in the dark.
On the night of May 31, 1942, Japanese midget submarines entered Sydney Harbour and attempted to attack Allied warships. The raid shocked Australia because it brought the war directly into one of the country’s most recognizable urban and naval spaces.
Sydney was not a remote military outpost. It was a major harbor city, a symbol of national life, and an important Allied location in the South Pacific. The idea that enemy submarines could enter its waters changed the emotional geography of the war for Australians. The front line no longer felt safely distant across the Pacific.
The attack involved small submarines operating under dangerous conditions inside a defended harbor. Although the raid failed to achieve its main strategic objective, it killed sailors aboard the depot ship HMAS Kuttabul and left a lasting mark on Australian wartime memory.
The event mattered because it made vulnerability visible. After Japan’s rapid advance and the bombing of Darwin, the Sydney Harbour attack reinforced the fear that Australia itself could become a direct target.
Read the full Sydney Harbour attack article to see how Japanese midget submarines brought the Pacific War into Australian home waters.
This event also connects closely with our wider World War II history archive.
1902 | Treaty of Vereeniging Ends the Second Boer War
The Second Boer War ended with signatures, but the peace carried the weight of empire, suffering, and exclusion.
On May 31, 1902, Britain and the Boer republics signed the Treaty of Vereeniging, bringing the Second Boer War to an official close. The treaty ended years of brutal conflict between the British Empire and the South African Republic and Orange Free State.
The war had not been fought only in formal battles. It had included guerrilla warfare, scorched-earth policies, destroyed farms, concentration camps, civilian suffering, and deep bitterness. By the time peace was signed, the conflict had tested Britain’s imperial confidence and left lasting scars across southern Africa.
Under the treaty, the Boer republics accepted British sovereignty. In return, the agreement included promises of reconstruction, financial assistance, and eventual self-government. Yet the peace also carried unresolved questions about race, land, political power, and who would be included in South Africa’s future.
The treaty mattered because it shaped the road toward the Union of South Africa in 1910. It ended a war, but it did not resolve the deeper tensions that empire had intensified.
Continue with the full Treaty of Vereeniging article and how the end of the Second Boer War reshaped South Africa’s political future.
You can also explore more War Conflicts and imperial history.
1279 BC | Ramesses II Becomes Pharaoh of Egypt
Ramesses II began a reign built not only to rule Egypt, but to be remembered by it.
On a reconstructed date often given as May 31, 1279 BC, Ramesses II became pharaoh of Egypt. The exact dating depends on ancient Egyptian chronology, but the accession marks the beginning of one of the longest and most famous reigns in Egyptian history.
Ramesses II ruled during the Nineteenth Dynasty and became associated with military ambition, diplomacy, royal image-making, and monumental architecture. His reign stretched across more than six decades, giving him time to cover Egypt with temples, statues, inscriptions, and visual claims to eternal kingship.
He is closely linked with the Battle of Kadesh against the Hittites, later diplomacy with the Hittite Empire, and monumental sites such as Abu Simbel and the Ramesseum. His image was carved into stone at a scale designed to overwhelm the viewer and outlast ordinary memory.
Ramesses II turned kingship into a permanent visual language of stone, temple walls, colossal statues, and royal names repeated across the landscape.
Explore the full Ramesses II article and how one pharaoh built his reign into Egypt’s monumental memory.
This story also fits into our broader Ancient History and Egyptian history coverage.
1911 | RMS Titanic Is Launched in Belfast
Titanic entered the water as a promise before it became a warning.
On May 31, 1911, RMS Titanic was launched at the Harland and Wolff shipyard in Belfast. The ship was not yet complete, and it had not yet begun its first voyage. This was the moment its enormous hull touched the water for the first time, watched by workers, shipbuilders, spectators, and representatives of an age that believed deeply in industrial progress.
Before tragedy reshaped its meaning, Titanic was a statement of confidence.
Built for the White Star Line as part of the Olympic-class ocean liners, Titanic represented scale, luxury, engineering ambition, and maritime technology. Its launch reflected the power of early twentieth-century shipbuilding: steel, rivets, cranes, gantries, skilled labor, and the belief that modern design could make the Atlantic crossing safer, faster, and more impressive.
The event matters because it shows Titanic before the disaster. On May 31, 1911, it was not yet a symbol of hubris or loss. It was an industrial achievement, a public spectacle, and a floating expression of Edwardian confidence.
Read the full Titanic launch article and how the ship first entered the water as a symbol of Edwardian engineering confidence.
This event also connects naturally with our wider Science & Space, engineering history, and maritime technology coverage.
1921 | Tulsa Race Massacre Begins
In Greenwood, prosperity itself became a target.
On May 31, 1921, the Tulsa Race Massacre began in Oklahoma when white mobs attacked the Greenwood District, one of the most prosperous Black communities in the United States. Greenwood was known as “Black Wall Street” because of its Black-owned businesses, homes, churches, newspapers, professionals, schools, and thriving local economy.
The violence destroyed far more than buildings.
It attacked a community that had built wealth, independence, culture, and civic life in the face of segregation and racial hostility. Homes and businesses were burned. Residents were killed and displaced. Families lost property, security, and records of what they had created.
For decades, the massacre was minimized, ignored, or excluded from many public histories. That silence became part of the injury. Survivors, descendants, historians, and community leaders later fought to restore Greenwood’s story to national memory.
The event matters because it exposes racial violence, economic resentment, suppressed history, and the long struggle for justice. May 31 remains a date tied to loss, resilience, memory, and the demand to confront what was once pushed out of view.
Continue with the full Tulsa Race Massacre article and why Greenwood’s destruction remains central to American historical memory.
You can also explore more Major Historical Events and civil rights history.
Famous Birthdays on May 31
- Walt Whitman — 1819
American poet whose Leaves of Grass reshaped American literature and poetic voice. - Rainier III, Prince of Monaco — 1923
Ruler of Monaco who helped modernize the principality and expand its global visibility. - Clint Eastwood — 1930
American actor and filmmaker known for major contributions to Westerns, crime cinema, and directing. - Peter Yarrow — 1938
American folk singer-songwriter and member of Peter, Paul and Mary. - Joe Namath — 1943
American football quarterback whose career and Super Bowl III victory made him a sports icon. - Sharon Gless — 1943
American actress known for influential television roles, including Cagney & Lacey. - Tom Berenger — 1949
American actor known for film and television roles, including war drama and thriller performances. - Brooke Shields — 1965
American actress, model, and author who became a major pop-culture figure from a young age. - Iga Świątek — 2001
Polish tennis player and Grand Slam champion who became one of the leading athletes of her generation.
The famous birthdays on May 31 move across poetry, monarchy, film, folk music, sport, television, celebrity culture, and modern athletics. Walt Whitman gives the date its strongest literary foundation. His poetry broke away from older forms and helped create a more expansive, democratic, and distinctly American voice. Leaves of Grass did not simply add to American literature; it changed the scale and rhythm of what American poetry could sound like.
The date also carries strong popular culture range. Peter Yarrow helped define the folk revival with Peter, Paul and Mary, while Joe Namath became one of American football’s most recognizable personalities. Sharon Gless, Tom Berenger, and Brooke Shields link May 31 to television, film, and public celebrity in different eras. Iga Świątek adds a living sports legacy, showing how this date continues to connect historical memory with achievement still unfolding.
Notable Deaths on May 31
- Joseph Haydn — 1809
Austrian composer whose work helped shape the Classical era and the development of the symphony and string quartet. - Elizabeth Blackwell — 1910
First woman to receive a medical degree in the United States and a pioneer for women in medicine. - Adolf Eichmann — 1962
Nazi official executed in Israel after his trial for his role in organizing the Holocaust. - Jacques Monod — 1976
French biologist and Nobel Prize laureate known for major work in molecular biology. - Timothy Leary — 1996
American psychologist and counterculture figure associated with psychedelic research and 1960s counterculture. - Millvina Dean — 2009
Last living survivor of the RMS Titanic disaster. - Jean Stapleton — 2013
American actress best known for portraying Edith Bunker on All in the Family. - Christo — 2020
Bulgarian-born artist known for large-scale environmental installations created with Jeanne-Claude.
The notable deaths on May 31 move across music, medicine, Holocaust memory, molecular biology, counterculture, maritime history, television, and public art. Joseph Haydn gives the date one of its strongest cultural legacies. His music helped define the Classical era and shaped forms that became central to Western composition, especially the symphony and string quartet.
The date also carries heavy moral weight through Adolf Eichmann. His execution followed one of the most important Holocaust trials of the twentieth century, a trial that brought survivor testimony, bureaucratic mass murder, and questions of responsibility before a global audience. Eichmann’s death became part of a much larger historical reckoning with genocide, obedience, and accountability.
Millvina Dean gives May 31 a direct link back to Titanic, as the last living survivor of the disaster. Jacques Monod and Timothy Leary connect the date to modern science, biology, psychology, and counterculture. Jean Stapleton and Christo add cultural range, from American television to monumental public art that temporarily transformed landscapes, buildings, and public spaces.
Why This Day Matters in History
Today in History May 31 is a date about visibility and memory.
In 1942, the Japanese midget submarine attack on Sydney Harbour showed Australians that the Pacific War was not distant. It could enter a familiar harbor at night. In 1902, the Treaty of Vereeniging ended the Second Boer War, but the peace it created carried forward unresolved questions of empire, race, land, and political power in South Africa. In ancient Egypt, the accession of Ramesses II began a reign built to be seen for eternity through temples, statues, inscriptions, and royal image-making.
The same theme appears in engineering and American history. The launch of RMS Titanic turned industrial ambition into public spectacle before tragedy reshaped its meaning. The Tulsa Race Massacre exposed both the violence used against Black prosperity and the long struggle to recover suppressed memory.
Across centuries, historical events on May 31 show how power becomes visible, how violence can be hidden, and how memory eventually demands to be seen.
Explore More History
Continue exploring related historical themes and daily history pages:
You can also continue with nearby daily history pages:
- Today in History – May 30
- Today in History – June 1
Did You Know?
The Sydney Harbour attack used Japanese midget submarines and showed Australians that the Pacific War could reach home waters. Its impact was psychological as well as military, because it brought war into one of the country’s most recognizable urban harbors.
The Treaty of Vereeniging ended the Second Boer War, but it did not resolve South Africa’s deeper questions of empire, land, race, and political power. The settlement helped shape the road toward the Union of South Africa in 1910.
Ramesses II ruled for more than six decades and filled Egypt with monuments designed to project royal power across time. His temples, statues, and inscriptions helped make him one of the most visible pharaohs in ancient history.
RMS Titanic was launched in 1911, nearly a year before its first and final voyage. At launch, it was celebrated as an engineering triumph rather than remembered as a disaster symbol.
The Tulsa Race Massacre was suppressed or minimized in many official accounts for decades. Its history has since become central to discussions of racial violence, historical memory, reparations, and justice in the United States.
Conclusion
Today in History May 31 brings together wartime attack, imperial peace, ancient kingship, maritime engineering, and racial violence. From the Japanese midget submarine raid on Sydney Harbour and the Treaty of Vereeniging to Ramesses II, the launch of RMS Titanic, and the beginning of the Tulsa Race Massacre, this date shows history becoming visible in harbors, treaty rooms, monuments, shipyards, and city streets.
Some events on May 31 were meant to display power. Others revealed fear, injustice, ambition, or memory. Together, they remind us that history is not only made by what happens in public view, but also by what later generations choose to uncover, remember, and finally confront.
