1785 - Jean-François Pilâtre de Rozier, co-pilot of the first-ever manned flight (1783), and his companion, Pierre Romain, become the first-ever casualties of an air crash when their hot air balloon explodes during their attempt to cross the English Channel.
1804 - New Hampshire approves the Twelfth Amendment to the United States Constitution, ratifying the document.
1836 - Arkansas is admitted as the 25th U.S. state.
1844 - Charles Goodyear receives a patent for vulcanization, a process to strengthen rubber.
1846 - The Oregon Treaty establishes the 49th parallel as the border between the United States and Canada, from the Rocky Mountains to the Strait of Juan de Fuca.
1859 - Pig War: Ambiguity in the Oregon Treaty leads to the "Northwestern Boundary Dispute" between U.S. and British/Canadian settlers.
1864 - American Civil War: Siege of Petersburg begins.
1864 - Arlington National Cemetery is established when 200 acres (0.8 km²) around Arlington Mansion are officially set aside as a military cemetery by U.S. Secretary of War Edwin M. Stanton.
1867 - Atlantic Cable Quartz Lode gold mine located in Montana.
1877 - Henry Ossian Flipper becomes the first African American cadet to graduate from the United States Military Academy.
1904 - A fire aboard the steamboat General Slocum in New York City's East River kills 1000.
1909 - Representatives from England, Australia and South Africa meet at Lord's and form the Imperial Cricket Conference.
1911 - Tabulating Computing Recording Corporation (IBM) is incorporated.
1913 - The Battle of Bud Bagsak in the Philippine concludes.
1916 - U.S. President Woodrow Wilson signs a bill incorporating the Boy Scouts of America, making them the only American youth organization with a federal charter.
1919 - John Alcock and Arthur Brown complete the first nonstop transatlantic flight at Clifden, County Galway, Ireland.
1934 - The U.S.'s Great Smoky Mountains National Park is founded.
1944 - World War II: Battle of Saipan: The United States invades Saipan.
1944 - In the Saskatchewan general election, 1944, the CCF, led by Tommy Douglas, is elected and forms the first socialist government of North America.
1945 - The General Dutch Youth League (ANJV) is founded in Amsterdam, Netherlands.
1954 - UEFA (Union des Associations Européennes de Football) is formed in Basle, Switzerland.
1955 - The Eisenhower administration stages the first annual "Operation Alert" (OPAL) exercise, an attempt to assess the USA's preparations for a nuclear attack.
1962 - Students for a Democratic Society complete the Port Huron Statement.
1985 - Rembrandt's painting Danaë is attacked by a man later judged insane; he threw sulfuric acid on the canvas and cut it twice with his knife.
1991 - Birth of the first federal political party in Canada that supports Quebec nationalism, le Bloc Québécois.
1992 - The United States Supreme Court rules in United States v. Álvarez-Machaín that it is permissible for the USA to forcibly extradite suspects in foreign countries and bring them to the USA for trial, without approval from those other countries.
1994 - Israel and Vatican City establish full diplomatic relations.
1996 - In Manchester, UK, a terrorist bomb injures over 200 people and devastates a large part of the city centre.
2002 - Near earth asteroid 2002 MN missed the Earth by 75,000 miles (120,000 km), about one-third of the distance between the Earth and the Moon.
