| 66121 | June 10 | Event | 1190 – Third Crusade: Frederick I Barbarossa drowns in the river Saleph while leading an army to Jerusalem. |
| 66122 | June 10 | Event | 1329 – The Battle of Pelekanon results in a Byzantine defeat by the Ottoman Empire. |
| 66123 | June 10 | Event | 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. |
| 66124 | June 10 | Event | 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. |
| 66125 | June 10 | Event | 1596 – Willem Barents and Jacob van Heemskerk discover Bear Island. |
| 66126 | June 10 | Event | 1619 – Thirty Years' War: Battle of Záblatí, a turning point in the Bohemian Revolt. |
| 66127 | June 10 | Event | 1624 – Signing of the Treaty of Compiègne between France and the Netherlands. |
| 66128 | June 10 | Event | 1692 – Salem witch trials: Bridget Bishop is hanged at Gallows Hill near Salem, Massachusetts, for "certaine Detestable Arts called Witchcraft & Sorceries". |
| 66129 | June 10 | Event | 1719 – Jacobite risings: Battle of Glen Shiel. |
| 66130 | June 10 | Event | 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. |
| 66131 | June 10 | Event | 1793 – The Jardin des Plantes museum opens in Paris. A year later, it becomes the first public zoo. |
| 66132 | June 10 | Event | 1793 – French Revolution: Following the arrests of Girondin leaders, the Jacobins gain control of the Committee of Public Safety installing the revolutionary dictatorship. |
| 66133 | June 10 | Event | 1805 – First Barbary War: Yusuf Karamanli signs a treaty ending the hostilities between Tripolitania and the United States. |
| 66134 | June 10 | Event | 1829 – The first Boat Race between the University of Oxford and the University of Cambridge takes place on the Thames in London. |
| 66135 | June 10 | Event | 1838 – Myall Creek massacre: Twenty-eight Aboriginal Australians are murdered. |
| 66136 | June 10 | Event | 1854 – The first class of United States Naval Academy students graduate. |
| 66137 | June 10 | Event | 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. |
| 66138 | June 10 | Event | 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. |
| 66139 | June 10 | Event | 1871 – Sinmiyangyo: Captain McLane Tilton leads 109 US Marines in a naval attack on Han River forts on Kanghwa Island, Korea. |
| 66140 | June 10 | Event | 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 |
| 66141 | June 10 | Event | 1886 – Mount Tarawera in New Zealand erupts, killing 153 people and destroying the famous Pink and White Terraces. Eruptions continue for 3 months creating a large, 17 km long fissure across the mountain peak. |
| 66142 | June 10 | Event | 1898 – Spanish–American War: U.S. Marines land on the island of Cuba. |
| 66143 | June 10 | Event | 1912 – The Villisca axe murders were discovered in Villisca, Iowa. |
| 66144 | June 10 | Event | 1916 – An Arab Revolt against the Ottoman Empire led by Lawrence of Arabia breaks out. |
| 66145 | June 10 | Event | 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. |
| 66146 | June 10 | Event | 1924 – Fascists kidnap and kill Italian Socialist leader Giacomo Matteotti in Rome. |
| 66147 | June 10 | Event | 1925 – Inaugural service for the United Church of Canada, a union of Presbyterian, Methodist, and Congregationalist churches, held in the Toronto Arena. |
| 66148 | June 10 | Event | 1935 – Dr. Robert Smith takes his last drink, and Alcoholics Anonymous is founded in Akron, Ohio, United States, by him and Bill Wilson. |
| 66149 | June 10 | Event | 1935 – Chaco War ends: A truce is called between Bolivia and Paraguay who had been fighting since 1932. |
| 66150 | June 10 | Event | 1936 – The Russian animation studio Soyuzmultfilm is founded. |