671 – Emperor Tenji of Japan introduces a water clock (clepsydra) called Rokoku. The instrument, which measures time and indicates hours, is placed in the capital of Ōtsu.
1190 – Third Crusade: Frederick I Barbarossa drowns in the river Saleph while leading an army to Jerusalem.
1329 – The Battle of Pelekanon results in a Byzantine defeat by the Ottoman Empire.
1523 – Copenhagen is surrounded by the army of Frederick I of Denmark, as the city won't recognise him as the successor of Christian II of Denmark.
1539 – Council of Trent: Pope Paul III sends out letters to his bishops, delaying the Council due to war and the difficulty bishops had traveling to Venice.
1596 – Willem Barents and Jacob van Heemskerk discover Bear Island.
1619 – Thirty Years' War: Battle of Záblatí, a turning point in the Bohemian Revolt.
1624 – Signing of the Treaty of Compiègne between France and the Netherlands.
1692 – Salem witch trials: Bridget Bishop is hanged at Gallows Hill near Salem, Massachusetts, for "certaine Detestable Arts called Witchcraft & Sorceries".
1719 – Jacobite risings: Battle of Glen Shiel.
1786 – A landslide dam on the Dadu River created by an earthquake ten days earlier collapses, killing 100,000 in the Sichuan province of China.
1793 – The Jardin des Plantes museum opens in Paris. A year later, it becomes the first public zoo.
1793 – French Revolution: Following the arrests of Girondin leaders, the Jacobins gain control of the Committee of Public Safety installing the revolutionary dictatorship.
1805 – First Barbary War: Yusuf Karamanli signs a treaty ending the hostilities between Tripolitania and the United States.
1829 – The first Boat Race between the University of Oxford and the University of Cambridge takes place on the Thames in London.
1838 – Myall Creek massacre: Twenty-eight Aboriginal Australians are murdered.
1854 – The first class of United States Naval Academy students graduate.
1861 – American Civil War: Battle of Big Bethel: Confederate troops under John B. Magruder defeat a much larger Union force led by General Ebenezer W. Pierce in Virginia.
1864 – American Civil War: Battle of Brice's Crossroads: Confederate troops under Nathan Bedford Forrest defeat a much larger Union force led by General Samuel D. Sturgis in Mississippi.
1871 – Sinmiyangyo: Captain McLane Tilton leads 109 US Marines in a naval attack on Han River forts on Kanghwa Island, Korea.
1878 – League of Prizren is established, to oppose the decisions of the Congress of Berlin and the Treaty of San Stefano, as a consequence of which the Albanian lands in Balkans were being partitioned and given to the neighbor states of Serbia, Montenegro, Bulgaria and Greece.
1886 – Mount Tarawera in New Zealand erupts, killing 153 people and burying the famous Pink and White Terraces. Eruptions continue for 3 months creating a large, 17 km long fissure across the mountain peak.
1898 – Spanish–American War: U.S. Marines land on the island of Cuba.
1916 – The Arab Revolt against the Ottoman Empire was declared by Hussein bin Ali, Sharif of Mecca.
1918 – The Austro-Hungarian battleship SMS Szent István sinks off the Croatian coast after being torpedoed by an Italian MAS motorboat; the event is recorded by camera from a nearby vessel.
1924 – Fascists kidnap and kill Italian Socialist leader Giacomo Matteotti in Rome.
1925 – Inaugural service for the United Church of Canada, a union of Presbyterian, Methodist, and Congregationalist churches, held in the Toronto Arena.
1935 – Dr. Robert Smith takes his last drink, and Alcoholics Anonymous is founded in Akron, Ohio, United States, by him and Bill Wilson.
1935 – Chaco War ends: A truce is called between Bolivia and Paraguay who had been fighting since 1932.
1940 – World War II: U.S. President Franklin D. Roosevelt denounces Italy's actions in his "Stab in the Back" speech at the graduation ceremonies of the University of Virginia.
1940 – World War II: Norway surrenders to German forces.
1940 – World War II: Italy declares war on France and the United Kingdom.
1942 – World War II: Nazis burn the Czech village of Lidice in reprisal for the killing of Reinhard Heydrich.
1944 – World War II: 642 men, women and children massacred at Oradour-sur-Glane, France.
1944 – World War II: In Distomo, Boeotia, Greece, 218 men, women and children are massacred by German troops.
1944 – In baseball, 15-year-old Joe Nuxhall of the Cincinnati Reds becomes the youngest player ever in a major-league game.
1945 – Australian Imperial Forces land in Brunei Bay to liberate Brunei.
1947 – Saab produces its first automobile.
1957 – John Diefenbaker leads the Progressive Conservative Party of Canada to a stunning upset in the Canadian federal election, 1957, ending 22 years of Liberal Party government.
1963 – Equal Pay Act of 1963 aimed at abolishing wage disparity based on sex (see Gender pay gap). It was signed into law on June 10, 1963 by John F. Kennedy as part of his New Frontier Program
1964 – United States Senate breaks a 75-day filibuster against the Civil Rights Act of 1964, leading to the bill's passage.
1967 – The Six-Day War ends: Israel and Syria agree to a cease-fire.
1967 – Argentina becomes a member of the Berne Convention copyright treaty.
1977 – James Earl Ray escapes from Brushy Mountain State Prison in Petros, Tennessee. He is recaptured three days later.
1980 – The African National Congress in South Africa publishes a call to fight from their imprisoned leader Nelson Mandela.
1990 – British Airways Flight 5390 lands safely at Southampton Airport after a blowout in the cockpit causes the captain to be partially sucked from the cockpit. There are no fatalities
1991 – Eleven-year-old Jaycee Lee Dugard is kidnapped in South Lake Tahoe, California; she would remain a captive until 2009.
1996 – Peace talks begin in Northern Ireland without the participation of Sinn Féin.
1997 – Before fleeing his northern stronghold, Khmer Rouge leader Pol Pot orders the killing of his defense chief Son Sen and 11 of Sen's family members.
1999 – Kosovo War: NATO suspends its airstrikes after Slobodan Milošević agrees to withdraw Serbian forces from Kosovo.
2001 – Pope John Paul II canonizes Lebanon's first female saint, Saint Rafqa.
2002 – The first direct electronic communication experiment between the nervous systems of two humans is carried out by Kevin Warwick in the United Kingdom.
2003 – The Spirit rover is launched, beginning NASA's Mars Exploration Rover mission.
2016 – Former The Voice contestant Christina Grimmie is fatally shot in Orlando, Florida following a concert; she died from her injuries at the age of 22.