Historical Events on Wednesday, 17th September

17/09/2025

Saudi Arabia and Pakistan sign the Strategic Mutual Defence Agreement.

The Strategic Mutual Defence Agreement (SMDA) is a security and defence pact between the countries of Pakistan and Saudi Arabia. Under this agreement, both countries have committed to treating any act of aggression against one as an act against both.

---

17/09/2018

A Russian reconnaissance aircraft carrying 15 people on board is brought down by a Syrian surface-to-air missile over the Mediterranean Sea.

On 17 September 2018, the Israeli Air Force (IAF) conducted missile strikes against multiple targets in government-controlled western Syria. Syrian air defences responded to the Israeli fighter jets, accidentally shooting a Russian military Il-20, killing 15 crew aboard. Russia blamed Israel for the loss of its plane, accusing the IAF of "hiding behind the Russian aircraft", thereby putting it in the line of fire. The Israel Defense Forces acknowledged striking a Syrian weapons facility, and expressed sorrow for the loss of lives due to Syrian fire. The strikes occurred a few hours after a Russo-Turkish agreement to create a demilitarized zone around Idlib Governorate was achieved, which postponed an imminent offensive operation by Syria's forces and its allies.

---

17/09/2016

Two bombs explode in Seaside Park, New Jersey, and Manhattan. Thirty-one people are injured in the Manhattan bombing.

On September 17–19, 2016, a series of three constructed bombs exploded, and several unexploded devices were discovered in the New York metropolitan area followed by a subsequent shooting in Linden, New Jersey during a nationwide manhunt for the perpetrator. The bombings and additional shootout left 33 people wounded, but no fatalities were reported. Federal investigators determined these explosive devices were deliberately set and identified them as part of a terrorist act.

---

17/09/2013

Grand Theft Auto V earns more than half a billion dollars on its first day of release.

Grand Theft Auto V is a 2013 action-adventure game developed by Rockstar North and published by Rockstar Games. It is the seventh main entry in the Grand Theft Auto series, following 2008's Grand Theft Auto IV, and the fifteenth instalment overall. Set within the fictional state of San Andreas, based on Southern California, the single-player story follows three protagonists—retired bank robber Michael De Santa, street gangster Franklin Clinton, and drug dealer and gunrunner Trevor Philips —and their attempts to commit heists while under pressure from a corrupt government agency and powerful criminals. Players freely roam San Andreas's open world countryside and fictional city of Los Santos, based on Los Angeles.

---

17/09/2011

Occupy Wall Street movement begins in Zuccotti Park, New York City.

Occupy Wall Street (OWS) was a left-wing populist and progressive movement against economic inequality, capitalism, corporate greed, big finance, and the influence of money in politics. It began in Zuccotti Park, located in New York City's Financial District, and lasted for fifty-nine days—from September 17 to November 15, 2011.

---

17/09/2006

Fourpeaked Mountain in Alaska erupts, marking the first eruption for the volcano in at least 10,000 years.

Fourpeaked Mountain, also known as Fourpeaked Volcano, is an active stratovolcano located in the U.S. state of Alaska within Katmai National Park and Preserve. The volcano is nearly completely covered by Fourpeaked Glacier.

---

An audio tape of a private speech by Hungarian Prime Minister Ferenc Gyurcsány is leaked to the public, in which he confessed that his Hungarian Socialist Party had lied to win the 2006 election, sparking widespread protests across the country.

The Őszöd speech was a speech Hungarian Prime Minister Ferenc Gyurcsány delivered to the 2006 Hungarian Socialist Party (MSZP) congress in Balatonőszöd. Though the May congress was confidential, Gyurcsány's address was leaked and broadcast by Magyar Rádió on Sunday, 17 September 2006, igniting a nationwide political crisis.

---

17/09/2001

The New York Stock Exchange reopens for trading after the September 11 attacks, the longest closure since the Great Depression.

The New York Stock Exchange is an American stock exchange headquartered at the New York Stock Exchange Building in the Financial District of Lower Manhattan in New York City. It is the largest stock exchange in the world by market capitalization, exceeding $44 trillion in January 2026. The NYSE is owned by Intercontinental Exchange, an American holding company that it also lists. Previously, it was part of NYSE Euronext (NYX), which was formed by the NYSE's 2007 merger with Euronext. According to a Gallup poll conducted in 2022, approximately 58% of American adults reported having money invested in the stock market, either through individual stocks, mutual funds, or retirement accounts.

---

George W. Bush, president of the United States, delivers remarks at the Islamic Center of Washington praising Muslim Americans and condemning Islamophobia in the aftermath of the September 11 attacks.

George Walker Bush is an American politician, businessman, and former United States Air Force officer who was the 43rd president of the United States, serving from 2001 to 2009. The eldest son of George H. W. Bush, the 41st president of the United States, he was the governor of Texas from 1995 to 2000.

---

17/09/1992

An Iranian Kurdish leader and his two joiners are assassinated by political militants in Berlin.

In the Mykonos restaurant assassinations, Iranian-Kurdish opposition leaders Sadegh Sharafkandi, Fattah Abdoli, Homayoun Ardalan and their translator Nouri Dehkordi, were assassinated at the Mykonos Greek restaurant in Berlin, Germany on 17 September 1992. The assassination took place during the KDPI insurgency (1989–96), as part of the general Kurdish separatism in Iran. The assassins were believed by German courts to have links to Iranian intelligence. Kazem Darabi, an Iranian intelligence service employee, was tried and sentenced to life imprisonment by the Berlin Supreme Court.

---

17/09/1991

Estonia, North Korea, South Korea, Latvia, Lithuania, the Marshall Islands and Micronesia join the United Nations.

Estonia, officially the Republic of Estonia, is a country in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Russia. The territory of Estonia consists of the mainland, the larger islands of Saaremaa and Hiiumaa, and over 2,300 other islands and islets on the east coast of the Baltic Sea. Its capital city of Tallinn, along with the city of Tartu, are the country's two largest urban areas. The Estonian language, of the Finnic family, is the official language and the first language of the majority of nearly 1.4 million people. Estonia is one of the least populous member states of the European Union.

---

The first version of the Linux kernel (0.01) is released to the Internet.

Linux is a family of open source Unix-like operating systems based on the Linux kernel, a kernel first released on 17 September 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which includes the kernel and supporting system software and libraries – most of which are provided by third parties – to create a complete operating system. Linux was originally designed as a clone of Unix and is released under the copyleft GPL license.

---

17/09/1983

Vanessa Williams becomes the first black Miss America.

Vanessa Lynn Williams is an American singer, actress, model, producer and dancer. She gained recognition as the first black woman to win the Miss America title when she was crowned Miss America 1984. She would later resign her title amid a media controversy surrounding nude photographs published in Penthouse magazine. 32 years later, Williams was offered a public apology during the Miss America 2016 pageant for the events.

---

17/09/1980

After weeks of strikes at the Lenin Shipyard in Gdańsk, Poland, the nationwide independent trade union Solidarity is established.

The Gdańsk Shipyard is a large Polish shipyard, located in the city of Gdańsk, northern Poland. The yard gained international fame when Polish trade union Solidarity was founded there in September 1980. It is situated on the western side of Martwa Wisła and on Ostrów Island.

---

Former Nicaraguan President Anastasio Somoza Debayle is killed in Asunción, Paraguay.

Anastasio "Tachito" Somoza Debayle was a Nicaraguan politician, military officer, hydraulic engineer, and dictator who served as the 53rd President of Nicaragua from 1967 to 1972 and again from 1974 until his fall in 1979. As head of the National Guard, he was de facto ruler of the country between 1967 and 1979, even during the period when he was not the de jure ruler.

---

17/09/1978

The Camp David Accords are signed by Israel and Egypt.

The Camp David Accords were a pair of political agreements signed by Egyptian president Anwar Sadat and Israeli prime minister Menachem Begin on 17 September 1978, following twelve days of secret negotiations at Camp David, the country retreat of the president of the United States in Maryland. The two framework agreements were signed at the White House and were witnessed by President Jimmy Carter. The second of these frameworks led directly to the 1979 Egypt–Israel peace treaty. Due to the agreement, Sadat and Begin received the shared 1978 Nobel Peace Prize. The first framework, which dealt with the Palestinian territories, was written without participation of the Palestinians and was condemned by the United Nations.

---

17/09/1976

The Space Shuttle Enterprise is unveiled by NASA.

Space Shuttle Enterprise is the first orbiter of the Space Shuttle system. Rolled out on September 17, 1976, it was built for NASA as part of the Space Shuttle program to perform atmospheric test flights after being launched from a modified Boeing 747. It was constructed without engines or a functional heat shield. As a result, it was not capable of spaceflight.

---

17/09/1974

Bangladesh, Grenada and Guinea-Bissau join the United Nations.

Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world and among the most densely populated with a population of over 174 million within an area of 148,460 square kilometres (57,320 sq mi). Bangladesh shares land borders with India to the north, west, and east, and Myanmar to the southeast. It has a coastline along the Bay of Bengal to its south and is separated from Bhutan and Nepal by the Siliguri Corridor, and from China by the Indian state of Sikkim to its north. Dhaka, the capital and largest city, is the nation's political, financial, and cultural centre, with its most affluent neighborhood Gulshan being among the most posh neighborhoods in South Asia. Chittagong is the second-largest city and the busiest port of the country.

---

17/09/1965

The Battle of Chawinda is fought between Pakistan and India.

The Battle of Chawinda was a major engagement between Pakistan and India during the Indo-Pakistani war of 1965 as part of the Sialkot campaign. It is well known as being one of the largest tank battles in history since the Battle of Kursk, which was fought between the Soviet Union and Nazi Germany in World War II.

---

17/09/1961

The world's first retractable roof stadium, the Civic Arena, opens in Pittsburgh, Pennsylvania.

The Civic Arena, formerly the Civic Auditorium and later Mellon Arena, was an arena located in Downtown Pittsburgh, Pennsylvania. The Civic Arena primarily served as the home to the Pittsburgh Penguins, the city's National Hockey League (NHL) franchise, from 1967 to 2010.

---

Northwest Orient Airlines Flight 706 crashes during takeoff from O'Hare International Airport in Chicago, Illinois, killing all 37 people on board.

Northwest Orient Airlines Flight 706 was a Lockheed L-188 Electra aircraft, registration N137US, which crashed on take-off from Chicago's O'Hare International Airport September 17, 1961. All 37 on board were killed in the accident.

---

17/09/1950

The People's Liberation Army Air Force Airborne Corps (Then known as the PLAAF 1st Ground Forces Brigade) is founded.

The People's Liberation Army Air Force Airborne Corp is a corps grade airborne and air assault force subordinated to People's Liberation Army Air Force (PLAAF) headquarters. Before April 2017, the Airborne Corps was called the PLAAF 15th Airborne Corps.

---

17/09/1949

The Canadian steamship SS Noronic burns in Toronto Harbour with the loss of over 118 lives.

SS Noronic was a Canadian passenger ship that was destroyed by fire in Toronto Harbour in September 1949 with the loss of at least 118 lives.

---

17/09/1948

The Lehi (also known as the Stern gang) assassinates Count Folke Bernadotte, who was appointed by the United Nations to mediate between the Arab nations and Israel.

Lehi, officially the Fighters for the Freedom of Israel and often known pejoratively as the Stern Gang, was a Zionist paramilitary militant organization founded by Avraham ("Yair") Stern in Mandatory Palestine. Its avowed aim was to evict the British authorities from Palestine by use of violence, allowing unrestricted immigration of Jews and the formation of a Jewish state. It was initially called the National Military Organization in Israel, upon being founded in August 1940, but was renamed Lehi one month later. The group referred to its members as terrorists and admitted to having carried out acts of terrorism.

---

The Nizam of Hyderabad surrenders his sovereignty over the Hyderabad State and joins the Indian Union.

Nizam of Hyderabad was the title of the ruler of Hyderabad State. Nizam is a shortened form of Niẓām ul-Mulk, and was the title bestowed upon Asaf Jah I when he was appointed Viceroy of the Deccan by the Mughal emperor Farrukhsiyar. In addition to being the Mughal viceroy (Naib) of the Deccan, Asaf Jah I was also the premier courtier of the Mughal Empire until 1724, when he established an independent realm based in Hyderabad, but in practice, continued to recognise the nominal authority of the emperor.

---

17/09/1944

World War II: Allied airborne troops parachute into the Netherlands as the "Market" half of Operation Market Garden and British XXX Corps advances into the Netherlands as the "Garden" half of the Operation.

Operation Market Garden was an Allied military operation during the Second World War fought in the German-occupied Netherlands from 17 to 25 September 1944. Its objective was to create a salient spanning 62 miles (100 km) into German territory with a bridgehead over the Nederrijn, creating an Allied invasion route into northern Germany. This was to be achieved by two sub-operations: seizing nine bridges with combined American, British and Polish airborne forces ("Market") followed by British land forces swiftly following over the bridges ("Garden").

---

World War II: Soviet troops launch the Tallinn Offensive against Germany and pro-independence Estonian units.

The Tallinn offensive was a strategic offensive by the Red Army's 2nd Shock Army and 8th Army and the Baltic Fleet against the German Army Detachment Narwa and Estonian units in mainland Estonia on the Eastern Front of World War II on 17–26 September 1944. Its German counterpart was the abandonment of the Estonian territory in a retreat codenamed Operation Aster.

---

World War II: German forces are attacked by the Allies in the Battle of San Marino.

The Battle of San Marino was an engagement on 17–20 September 1944 during the Italian Campaign of the Second World War, in which German Army forces occupied the neutral Republic of San Marino and were then attacked by Allied forces. It is also sometimes known as the Battle of Monte Pulito.

---

17/09/1941

World War II: A decree of the Soviet State Committee of Defense restores compulsory military training.

Vsevobuch, a portmanteau for "Universal Military Training", was a system of compulsory military training for men practiced in the Russian SFSR governed by the Chief Administration of Universal Military Training of the People's Commissariat of Military Affairs.

---

World War II: Soviet forces enter Tehran during the Anglo-Soviet invasion of Iran.

The Anglo-Soviet invasion of Iran, also known as the Anglo-Soviet invasion of Persia or the Allied invasion of Iran, was the joint invasion of the officially neutral Imperial State of Iran by the United Kingdom and the Soviet Union in August 1941. The two powers announced that they would stay until six months after the end of the war with their mutual enemy, Nazi Germany, which turned out to be 2 March 1946. On that date the British began to withdraw, while the Soviet Union delayed until May, initially citing "threats to Soviet security", followed by the Iran crisis of 1946.

---

17/09/1940

World War II: Due to setbacks in the Battle of Britain and approaching autumn weather, Hitler postpones Operation Sea Lion.

The Battle of Britain was a military campaign of the Second World War, in which the Royal Air Force (RAF) and the Fleet Air Arm (FAA) of the Royal Navy defended the United Kingdom against large-scale attacks by Nazi Germany's air force, the Luftwaffe. It was the first major military campaign fought entirely by air forces. It takes its name from the speech given by Prime Minister Winston Churchill to the House of Commons on 18 June, 1940: "What General Weygand called the 'Battle of France' is over. I expect that the Battle of Britain is about to begin."

---

17/09/1939

World War II: The Soviet invasion of Poland begins.

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. Tanks and aircraft played major roles, the latter enabling the strategic bombing of cities and delivery of the only nuclear weapons used in war. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

---

World War II: German submarine U-29 sinks the British aircraft carrier HMS Courageous.

German submarine U-29 was a Type VIIA U-boat of Nazi Germany's Kriegsmarine during World War II.

---

17/09/1935

The Niagara Gorge Railroad ceases operations after a rockslide.

The Niagara Gorge Railroad was an interurban railway which ran at the bottom of the Niagara Gorge from Niagara Falls, New York to Lewiston, New York.

---

17/09/1932

A speech by Laureano Gómez leads to the escalation of the Leticia Incident.

Laureano Eleuterio Gómez Castro was a Colombian politician and civil engineer who served as President of Colombia from 1950 to 1953. In November 1951 poor health led him to cede presidential power to Roberto Urdaneta Arbeláez. On 13 June 1953, when he tried to resume his presidency, he was overthrown in a military coup led by Gustavo Rojas Pinilla.

---

17/09/1930

The Kurdish Ararat rebellion is suppressed by the Turks.

The Ararat rebellion, also known as the Ağrı rebellion, was a 1930 uprising by the Kurds of Ağrı Province, in eastern Turkey, against the Turkish government. The leader of the guerrilla forces during the rebellion was Ihsan Nuri of the Jibran branch of the Jalali tribe.

---

17/09/1928

The Okeechobee hurricane strikes southeastern Florida, killing more than 2,500 people.

The Okeechobee hurricane of 1928, also known as the San Felipe Segundo hurricane and Florida's Forgotten Storm, was one of the deadliest hurricanes in the recorded history of the North Atlantic basin, and the fourth deadliest hurricane in the United States, only behind the 1900 Galveston hurricane, 1899 San Ciriaco hurricane, and Hurricane Maria in 2017. The hurricane killed an estimated 2,500 people in the United States; most of the fatalities occurred in the state of Florida, particularly around Lake Okeechobee. It was the fourth tropical cyclone, third hurricane, and only major hurricane of the 1928 Atlantic hurricane season, and remains the deadliest disaster in Florida's history to date. It developed off the west coast of Africa on September 6 as a tropical depression, but it strengthened into a tropical storm later that day, shortly before passing south of the Cape Verde islands. Further intensification was slow and halted late on September 7. About 48 hours later, the storm strengthened and became a Category 1 hurricane on the Saffir–Simpson hurricane wind scale. Still moving westward, the system reached Category 4 intensity before striking Guadeloupe on September 12, where it brought great destruction and resulted in 1,200 deaths. The islands of Martinique, Montserrat, and Nevis also reported damage and fatalities, but not nearly as severe as in Guadeloupe.

---

17/09/1924

The Border Protection Corps is established in the Second Polish Republic for the defence of the eastern border against armed Soviet raids and local bandits.

The Border Protection Corps was a military formation of the Second Polish Republic that was created in 1924 to defend the country's eastern borders against armed Soviet incursions and local bandits. Other borders were under the jurisdiction of a separate, regular Border Guard state security agency.

---

17/09/1920

The National Football League is organized as the American Professional Football Association in Canton, Ohio.

The National Football League (NFL) is a professional American football league in the United States. Composed of 32 teams, it is divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the major professional sports leagues in the United States and Canada and the highest professional level of American football in the world. Each NFL season begins annually with a three-week preseason in August, followed by an 18-week regular season, which runs from early September to early January, with each team playing 17 games and having one bye week. Seven teams from each conference, including the four division winners and three wild card teams, then advance to the playoffs, a single-elimination tournament, which culminates in the Super Bowl, played in early February between the winners of the AFC and NFC championship games. The NFL is headquartered in New York City.

---

17/09/1916

World War I: Manfred von Richthofen ("The Red Baron"), a flying ace of the German Luftstreitkräfte, wins his first aerial combat near Cambrai, France.

Rittmeister Manfred Albrecht Freiherr von Richthofen, known in English as Baron von Richthofen or the Red Baron, was a German fighter pilot with the German Air Force during World War I. He is considered the ace-of-aces of the war, being officially credited with 80 air combat victories.

---

17/09/1914

Andrew Fisher becomes Prime Minister of Australia for the third time.

Andrew Fisher was an Australian politician and trade unionist who served as the fifth prime minister of Australia from 1908 to 1909, 1910 to 1913 and 1914 to 1915. He held office as the leader of the Australian Labor Party (ALP), and was particularly notable for leading the party to its first federal election victory and first majority government at the 1910 federal election.

---

World War I: The Race to the Sea begins.

World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Major areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. The war saw important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 15 to 22 million military and civilian casualties and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

---

17/09/1908

The Wright Flyer flown by Orville Wright, with Lieutenant Thomas Selfridge as passenger, crashes, killing Selfridge, who becomes the first airplane fatality.

The Wright Flyer made the first sustained flight by a manned heavier-than-air powered and controlled aircraft on December 17, 1903. Invented and flown by brothers Orville and Wilbur Wright, it marked the beginning of the pioneer era of aviation.

---

17/09/1901

Second Boer War: A Boer column defeats a British force at the Battle of Blood River Poort.

The Second Boer War, also known as the Boer War, Transvaal War, Anglo–Boer War, or the South African War, was a conflict fought between the British Empire and the Boer republics over Britain's influence in Southern Africa.

---

Second Boer War: Boers capture a squadron of the 17th Lancers at the Battle of Elands River.

The Battle of Elands River took place near the Elands River Poort mountain pass on 17 September 1901 during the Second Boer War. During the battle a Boer raiding force under Jan Smuts destroyed a British cavalry squadron led by Captain Sandeman, a cousin of Winston Churchill, on the Modderfontein farm. This battle is therefore also known as the Battle of Modderfontein.

---

17/09/1900

Philippine–American War: Filipinos under Juan Cailles defeat Americans under Colonel Benjamin F. Cheatham Jr. at Mabitac.

The Philippine–American War, known alternatively as the Filipino–American War, Philippine Insurrection, or Tagalog Insurgency, emerged in early 1899 following the United States' annexation of the former Spanish colony of the Philippine Islands under the terms of the December 1898 Treaty of Paris following the Spanish–American War. Philippine nationalists had proclaimed independence in June 1898 and constituted the First Philippine Republic in January 1899. The United States did not recognize either event as legitimate, and tensions escalated until fighting commenced on February 4, 1899, in the Battle of Manila.

---

17/09/1894

Battle of the Yalu River, the largest naval engagement of the First Sino-Japanese War.

The Battle of the Yalu River was the largest naval engagement of the First Sino-Japanese War, and took place on 17 September 1894, the day after the Japanese victory at the land Battle of Pyongyang. The Imperial Japanese Navy defeated the Chinese Beiyang Fleet.

---

17/09/1862

American Civil War: George B. McClellan's Army of the Potomac halts the first invasion of the North by Robert E. Lee and his Army of Northern Virginia in the single-day Battle of Antietam, the bloodiest day in American military history.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union to preserve slavery in the United States, which they saw as threatened because of the election of Abraham Lincoln and the growing abolitionist movement in the North. The war lasted a little over four years, ending with Union victory, the dissolution of the Confederacy and the abolition of slavery, freeing four million African Americans.

---

American Civil War: The Allegheny Arsenal explosion in Lawrenceville, Pennsylvania results in the single largest civilian disaster during the war.

The Allegheny Arsenal, established in 1814, was an important supply and manufacturing center for the Union Army during the American Civil War, and the site of the single largest civilian disaster during the war. It was located in the community of Lawrenceville, Pennsylvania, which was annexed by the city of Pittsburgh in 1868.

---

17/09/1861

Argentine Civil Wars: The State of Buenos Aires defeats the Argentine Confederation at the Battle of Pavón.

The Argentine Civil Wars were a series of civil conflicts of varying intensity that took place in the territories of Argentina from 1814 to 1853. Beginning concurrently with the Argentine War of Independence (1810–1818), the conflict prevented the formation of a stable governing body until the signing of the Argentine Constitution of 1853, followed by low-frequency skirmishes that ended with the Federalization of Buenos Aires in 1880.

---

17/09/1859

Joshua A. Norton declares himself "Norton I, Emperor of the United States".

Joshua Abraham Norton was a resident of San Francisco, California, who in 1859 declared himself "Emperor of these United States" in a proclamation that he signed "Norton I., Emperor of the United States". Commonly known as Emperor Norton, he took the secondary title "Protector of Mexico" in 1866.

---

17/09/1849

American abolitionist Harriet Tubman makes her first attempt to escape from slavery.

Harriet Tubman was an American abolitionist and social activist. After escaping slavery, Tubman made some 13 missions to rescue approximately 70 enslaved people, including her family and friends, using the network of antislavery activists and safe houses known collectively as the Underground Railroad. During the American Civil War, she served as an armed scout and spy for the Union Army. In her later years, Tubman was an activist in the movement for women's suffrage.

---

17/09/1809

Peace between Sweden and Russia in the Finnish War; the territory that will become Finland is ceded to Russia by the Treaty of Fredrikshamn.

The Finnish War was fought between the Kingdom of Sweden and the Russian Empire from 21 February 1808 to 17 September 1809 as part of the Napoleonic Wars. As a result of the war, the eastern third of Sweden was established as the autonomous Grand Duchy of Finland within the Russian Empire. Other notable effects were the Swedish parliament's adoption of a new constitution and the establishment of the House of Bernadotte, the new Swedish royal house, in 1818.

---

17/09/1794

Flanders Campaign: France completes its conquest of the Austrian Netherlands at the Battle of Sprimont.

The Low Countries theatre of the War of the First Coalition, also known as the Flanders campaign, was a series of campaigns in the Low Countries conducted from 20 April 1792 to 7 June 1795 during the first years of the War of the First Coalition. As the French Revolution radicalised, the revolutionary National Convention and its predecessors broke the Catholic Church's power (1790), abolished the monarchy (1792) and even executed the deposed king Louis XVI (1793), vying to spread the Revolution beyond the new French Republic's borders, by violent means if necessary. The First Coalition, an alliance of reactionary states representing the Ancien Régime in Central and Western Europe – Habsburg Austria, Prussia, Great Britain, the Dutch Republic, Hanover and Hesse-Kassel – mobilised military forces along all the French frontiers, threatening to invade Revolutionary France and violently restore the monarchy. The subsequent combat operations along the French borders with the Low Countries and Germany became the primary theatre of the War of the First Coalition until March 1796, when Napoleon took over French command on the Italian front.

---

17/09/1793

War of the Pyrenees: France defeats a Spanish force at the Battle of Peyrestortes.

The War of the Pyrenees, also known as War of Roussillon or War of the Convention, was the Pyrenean front of the First Coalition's war against the First French Republic. It pitted Revolutionary France against the kingdoms of Spain and Portugal from March 1793 to July 1795 during the French Revolutionary Wars.

---

17/09/1787

The United States Constitution is signed at Independence Hall in Philadelphia, bringing the Constitutional Convention to an end.

The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution defined the foundational structure of the federal government.

---

17/09/1778

The Treaty of Fort Pitt is signed. It is the first formal treaty between the United States and a Native American tribe.

The Treaty of Fort Pitt, also known as the Treaty With the Delawares, the Delaware Treaty, or the Fourth Treaty of Pittsburgh, was signed on September 17, 1778; it was the first formal treaty between the new United States of America and any Native American groups, in this case the Lenape, called the Delaware by white settlers. Although there were informal agreements between Native Americans and the Americans during the American Revolutionary War, the first one that resulted in a formal document was signed at Fort Pitt, Pennsylvania, now the site of Downtown Pittsburgh. It was essentially a treaty of military alliance between the Lenape Nation and the United States.

---

17/09/1776

The Presidio of San Francisco is founded in New Spain.

The Presidio of San Francisco is a park and former U.S. Army post on the northern tip of the San Francisco Peninsula in San Francisco, California, and is part of the Golden Gate National Recreation Area.

---

17/09/1775

American Revolutionary War: The invasion of Quebec by the Continental Army begins with the Siege of Fort St. Jean.

The American Revolutionary War, also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continental Army and commanded by George Washington defeated the British Army. The conflict was fought in North America, the Caribbean, and the Atlantic Ocean. The war's outcome seemed uncertain for most of the war, but Washington and the Continental Army's decisive victory in the Siege of Yorktown in 1781 led King George III and the Kingdom of Great Britain to negotiate an end to the war. In 1783, in the Treaty of Paris, the British monarchy acknowledged the independence of the Thirteen Colonies, leading to the establishment of the United States as an independent and sovereign nation.

---

17/09/1683

Antonie van Leeuwenhoek writes a letter to the Royal Society describing "animalcules", later known as protozoa.

Antonie Philips van Leeuwenhoek was a Dutch microbiologist and microscopist in the Golden Age of Dutch art, science and technology. A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and one of the first microscopists and microbiologists. Van Leeuwenhoek is best known for his pioneering work in microscopy and for his contributions toward the establishment of microbiology as a scientific discipline.

---

17/09/1658

The Battle of Vilanova is fought between Portugal and Spain during the Portuguese Restoration War.

The Battle of Vilanova took place on 17 September 1658 during the Portuguese Restoration War near the Fort of São Luis de Gonzaga, located downstream from Tui on the southern bank of the Minho River. A Spanish army commanded by the Governor of Galicia, Rodrigo Pimentel, Marquis of Viana, entered Portuguese territory and confronted a Portuguese army led by João Rodrigues de Vasconcelos e Sousa, 2nd Count of Castelo Melhor. The Spanish were victorious and proceeded over the following months to capture Monção, Salvaterra de Miño and other Portuguese strongholds.

---

17/09/1631

Sweden wins a major victory at the Battle of Breitenfeld against the Holy Roman Empire during the Thirty Years' War.

The Battle of Breitenfeld took place during the Thirty Years' War on 17 September 1631 near Breitenfeld, Leipzig, in modern Saxony. A combined Swedish-Saxon army led by Gustavus Adolphus, King of Sweden and John George I, Elector of Saxony defeated an Imperial-Catholic League Army under Johann Tserclaes, Count of Tilly.

---

17/09/1630

The city of Boston, Massachusetts, is founded in North America.

Boston is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. Boston has an area of 48.4 sq mi (125 km2) and a population of 675,647 as of the 2020 census, making it the third-most populous city in the Northeastern United States after New York City and Philadelphia. The larger Greater Boston metropolitan statistical area had a population of 4.9 million in 2023, making it the largest metropolitan area in New England and the eleventh-largest in the United States.

---

17/09/1620

Polish–Ottoman War: The Ottoman Empire defeats the Polish–Lithuanian Commonwealth during the Battle of Cecora.

The Polish–Ottoman War (1620–1621) was a conflict between the Polish–Lithuanian Commonwealth and the Ottoman Empire over the control of Moldavia. It ended with the Commonwealth withdrawing its claims on Moldavia and led to the eventual demise of the Sultan Osman II.

---

17/09/1577

The Treaty of Bergerac is signed between King Henry III of France and the Huguenots.

The Treaty of Bergerac was signed at Bergerac on 14 September 1577 between Henry III of France and Huguenot princes, and later ratified by the Edict of Poitiers on 17 September. This accord was developed after the sixth phase of the French Wars of Religion. The treaty replaced the Edict of Beaulieu, which was deemed by the Catholic League as too favorable to Protestants. Based on the terms of the treaty, Huguenots were only allowed to practice their faith in the suburbs of one town in each judicial district. In Vivarais, the treaty was recognized in late October 1577.

---

17/09/1543

The first Finnish-language book, the Abckiria by Mikael Agricola, is published in Stockholm.

Finnish is a Finnic language of the Uralic language family, spoken by the majority of the population in Finland and by ethnic Finns outside of Finland. Finnish is one of the two official languages of Finland, alongside Swedish. In Sweden, both Finnish and Meänkieli are official minority languages. Kven, which like Meänkieli is mutually intelligible with Finnish, is spoken in the Norwegian counties of Troms and Finnmark by a minority of Finnish descent.

---

17/09/1462

Thirteen Years' War: A Polish army under Piotr Dunin decisively defeats the Teutonic Order at the Battle of Świecino.

The Thirteen Years' War, also called the War of the Cities, was a conflict fought in 1454–1466 between the Prussian Confederation, allied with the Crown of the Kingdom of Poland, and the State of the Teutonic Order.

---

17/09/1382

Louis the Great's daughter, Mary, is crowned "king" of Hungary.

Louis I, also known as Louis the Great or Louis the Hungarian, was King of Hungary and Croatia from 1342 and King of Poland from 1370 until his death in 1382. He was the first child of Charles I of Hungary and his wife, Elizabeth of Poland, to survive infancy. A 1338 treaty between his father and Casimir III of Poland, Louis's maternal uncle, confirmed Louis's right to inherit the Kingdom of Poland if his uncle died without a son. In exchange, Louis was obliged to assist his uncle to reoccupy the lands that Poland had lost in previous decades. He bore the title Duke of Transylvania between 1339 and 1342 but did not administer the province.

---

17/09/1176

The Battle of Myriokephalon is the last attempt by the Byzantine Empire to recover central Anatolia from the Seljuk Turks.

The Battle of Myriokephalon was a battle between the Byzantine Empire and the Seljuk Turks in the mountains west of Iconium (Konya) in west-central Anatolia on 17 September 1176. The battle was a strategic reverse for the Byzantine forces, who were ambushed when moving through a mountain pass.

---

17/09/1111

Highest Galician nobility led by Pedro Fróilaz de Traba and the bishop Diego Gelmírez crown Alfonso VII as "King of Galicia".

The Kingdom of Galicia was a political entity located in southwestern Europe, which, at its territorial zenith, occupied the entire northwest of the Iberian Peninsula. In the early 10th century, the Kingdom of Galicia was formed following the division of the Kingdom of Asturias after the death of Alfonso III in 910. His sons split the kingdom, with Ordoño II inheriting Galicia. While Galicia became a distinct political entity, it remained closely tied to the Leonese and Asturian realms through dynastic connections. Later, Ordoño II integrated Galicia into the Kingdom of León when he inherited the latter. Though the Kingdom of Galicia had moments of semi-independence, it was typically seen as part of the Kingdom of León. Compostela became the capital of Galicia in the 11th century, while the independence of Portugal (1128) determined its southern boundary. The accession of Castilian King Ferdinand III to the Leonese kingdom in 1230 brought Galicia under the control of the Crown of Castile.

---