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On This Day 25-August Events that happened on this date.

Year Name / Event Description
766 Constantine V Emperor Constantine V humiliates nineteen high-ranking officials, after discovering a plot against him. He executes the leaders, Constantine Podopagouros and his brother Strategios.
1248 Ommen The Dutch city of Ommen receives city rights and fortification rights from Otto III, the Archbishop of Utrecht.
1258 George Mouzalon Regent George Mouzalon and his brothers are killed during a coup headed by the aristocratic faction under Michael VIII Palaiologos, paving the way for its leader to ultimately usurp the throne of the Empire of Nicaea.
1270 Philip III of France Philip III, although suffering from dysentery, becomes King of France following the death of his father Louis IX, during the Eighth Crusade. His uncle, Charles I of Naples, is forced to begin peace negotiations with Muhammad I al-Mustansir, Hafsid Sultan of Tunis.
1537 Honourable Artillery Company The Honourable Artillery Company, the oldest surviving regiment in the British Army, and the second most senior, is formed.
1543 António Mota António Mota and a few companions become the first Europeans to visit Japan.
1580 War of the Portuguese Succession War of the Portuguese Succession: Spanish victory at the Battle of Alcântara brings about the Iberian Union.
1609 Galileo Galilei Galileo Galilei demonstrates his first telescope to Venetian lawmakers.
1630 Kingdom of Kandy Portuguese forces are defeated by the Kingdom of Kandy at the Battle of Randeniwela in Sri Lanka.
1758 Seven Years' War Seven Years' War: Frederick II of Prussia defeats the Russian army at the Battle of Zorndorf.
1814 War of 1812 War of 1812: On the second day of the Burning of Washington, British troops torch the Library of Congress, United States Treasury, Department of War, and other public buildings.
1823 Hugh Glass American fur trapper Hugh Glass is mauled by a grizzly bear while on an expedition in South Dakota.
1825 Thirty-Three Orientals The Thirty-Three Orientals declare the independence of Uruguay from Brazil.
1830 Belgian Revolution The Belgian Revolution begins.
1835 Great Moon Hoax The first Great Moon Hoax article is published in The New York Sun, announcing the discovery of life and civilization on the Moon.
1875 Matthew Webb Captain Matthew Webb becomes the first person to swim across the English Channel, traveling from Dover, England, to Calais, France, in 21 hours and 45 minutes.
1883 French Third Republic France and Viet Nam sign the Treaty of Huế, recognizing a French protectorate over Annam and Tonkin.
1894 Kitasato Shibasaburō Kitasato Shibasaburō discovers the infectious agent of the bubonic plague and publishes his findings in The Lancet.
1904 Russo-Japanese War Russo-Japanese War: The Battle of Liaoyang begins.
1912 Kuomintang The Kuomintang is founded for the first time in Peking.
1914 World War I World War I: Japan declares war on Austria-Hungary.
1914 Sack of Louvain World War I: The library of the Catholic University of Leuven is deliberately destroyed by the German Army. Hundreds of thousands of irreplaceable volumes and Gothic and Renaissance manuscripts are lost.
1916 National Park Service The United States National Park Service is created.
1920 Polish–Soviet War Polish–Soviet War: Battle of Warsaw, which began on August 13, ends with the Red Army's defeat.
1933 1933 Diexi earthquake The Diexi earthquake strikes Mao County, Sichuan, China and kills 9,000 people.
1933 Nazi Germany Nazi Germany and the Zionist Federation of Germany signed the Haavara Agreement. The agreement was a major factor in breaking the anti-Nazi boycott of 1933 and facilitated Jewish emigration from Germany and into Palestine.
1939 Irish Republican Army The Irish Republican Army carries out the 1939 Coventry bombing in which five civilians were killed.
1939 Second Polish Republic The United Kingdom and Poland form a military alliance in which the UK promises to defend Poland in case of invasion by a foreign power.
1940 World War II World War II: The first Bombing of Berlin by the British Royal Air Force.
1941 Anglo-Soviet invasion of Iran World War II: Anglo-Soviet invasion of Iran: The United Kingdom and the Soviet Union jointly stage an invasion of the Imperial State of Iran.
1942 Battle of the Eastern Solomons World War II: Second day of the Battle of the Eastern Solomons; a Japanese naval transport convoy headed towards Guadalcanal is turned back by an Allied air attack.
1942 Battle of Milne Bay World War II: Battle of Milne Bay: Japanese marines assault Allied airfields at Milne Bay, New Guinea, initiating the Battle of Milne Bay.
1944 Liberation of Paris World War II: Paris is liberated by the Allies.
1945 Victory over Japan Day Ten days after World War II ends with Japan announcing its surrender, armed supporters of the Chinese Communist Party kill U.S. intelligence officer John Birch, regarded by some of the American right as the first victim of the Cold War.
1945 August Revolution The August Revolution ends as Emperor Bảo Đại abdicates, ending the Nguyễn dynasty.
1948 House Un-American Activities Committee The House Un-American Activities Committee holds first-ever televised congressional hearing: "Confrontation Day" between Whittaker Chambers and Alger Hiss.
1950 Frank Pace To avert a threatened strike during the Korean War, President Truman orders Secretary of the Army Frank Pace to seize control of the nation's railroads.
1958 Instant noodles The world's first publicly marketed instant noodles, Chikin Ramen, are introduced by Taiwanese-Japanese businessman Momofuku Ando.
1960 1960 Summer Olympics The Games of the XVII Olympiad commence in Rome, Italy.
1961 Jânio Quadros President Jânio Quadros of Brazil resigns after just seven months in power, initiating a political crisis that culminates in a military coup in 1964.
1967 George Lincoln Rockwell George Lincoln Rockwell, founder of the American Nazi Party, is assassinated by a former member of his group.
1980 Zimbabwe Zimbabwe joins the United Nations.
1981 Voyager 2 Voyager 2 spacecraft makes its closest approach to Saturn.
1985 Bar Harbor Airlines Flight 1808 Bar Harbor Airlines Flight 1808 crashes near Auburn/Lewiston Municipal Airport in Auburn, Maine, killing all eight people on board including peace activist and child actress Samantha Smith.
1989 Voyager 2 Voyager 2 spacecraft makes its closest approach to Neptune, the last planet in the Solar System at the time, due to Pluto being within Neptune's orbit from 1979 to 1999.
1989 Pakistan International Airlines Flight 404 Pakistan International Airlines Flight 404, carrying 54 people, disappears over the Himalayas after takeoff from Gilgit Airport in Pakistan. The aircraft was never found.
1991 Belarus Belarus gains its independence from the Soviet Union.
1991 Battle of Vukovar The Battle of Vukovar begins. An 87-day siege of Vukovar by the Yugoslav People's Army (JNA), supported by various Serb paramilitary forces, between August and November 1991 (during the Croatian War of Independence).
1991 Linus Torvalds Linus Torvalds announces the first version of what will become Linux.
1997 Egon Krenz Egon Krenz, the former East German leader, is convicted of a shoot-to-kill policy at the Berlin Wall.
2001 Aaliyah American singer Aaliyah and several members of her entourage are killed as their overloaded aircraft crashes shortly after takeoff from Marsh Harbour Airport, Bahamas.
2003 NASA NASA successfully launches the Spitzer Space Telescope into space.
2005 Hurricane Katrina Hurricane Katrina makes landfall in Florida.
2006 Pavlo Lazarenko Former Prime Minister of Ukraine Pavlo Lazarenko is sentenced to nine years imprisonment for money laundering, wire fraud, and extortion.
2010 Filair A Filair Let L-410 Turbolet crashes on approach to Bandundu Airport, killing 20.
2011 2011 Monterrey casino attack Fifty-two people are killed during an arson attack caused by members of the drug cartel Los Zetas.
2012 Voyager 1 Voyager 1 spacecraft enters interstellar space, becoming the first man-made object to do so.
2017 Hurricane Harvey Hurricane Harvey makes landfall in Texas as a powerful Category 4 hurricane, the strongest hurricane to make landfall in the United States since 2004.
2017 Conflict in Rakhine State (2016–present) Conflict in Rakhine State (2016–present): One hundred seventy people are killed in at least 26 separate attacks carried out by the Arakan Rohingya Salvation Army, leading to the governments of Myanmar and Malaysia designating the group as a terrorist organisation.