| | 1098 - Fighters of the First Crusade defeat Kerbogha of Mosul. |
| | 1243 - Innocent IV becomes Pope. |
| | 1389 - Ottoman and Serbian armies fight the bloody battle of Kosovo, opening the way for the Ottoman conquest of Southeastern Europe (see Vidovdan). |
| | 1519 - Charles V elected emperor of the Holy Roman Empire. |
| | 1635 - Guadeloupe becomes a French colony. |
| | 1651 - Battle of Beresteczko between Poles and Ukrainians, the biggest battle in the 17th century, starts. |
| | 1763 - Earthquake in Komarom, Hungary |
| | 1776 - Thomas Hinkey was hanged for mutiny, sedition, and treachery for plotting to kidnap George Washington. Hinkey was one of his bodyguards. |
| | 1778 - American Revolutionary War: Battle of Monmouth fought between the American Continental Army under George Washington and the British Army led by Sir Henry Clinton. |
| | 1838 - The coronation of Victoria of the United Kingdom. |
| | 1855 - The Sigma Chi Fraternity was founded at Miami University |
| | 1859 - First conformation dog show is held in Newcastle-on-Tyne, England. |
| | 1880 - Ned Kelly the Australian bushranger captured at Glenrowan. |
| | 1881 - Secret treaty between Austria and Serbia. |
| | 1886 - First scheduled Canadian transcontinental passenger train departs from Montreal, Quebec for Port Moody, British Columbia. |
| | 1887 - Minot, North Dakota incorporated as a city. |
| | 1894 - Labor Day becomes an official US holiday. |
| | 1895 - El Salvador, Honduras and Nicaragua form the Central American Union. |
| | 1914 - Franz Ferdinand, Archduke of Austria and his wife Sophie are assassinated in Sarajevo by young Serbian nationalist Gavrilo Princip , the casus belli of World War I. |
| | 1919 - The Treaty of Versailles is signed in Paris, formally ending World War I between Britain, France, Italy, the United States and allies on the one side and Germany and Austria Hungary on the other side. |
| | 1922 - The Irish Civil War begins with the shelling of the Four Courts in Dublin by Free State forces. |
| | 1936 - The Japanese puppet state of Mengjiang is formed in northern China. |
| | 1938 - A 450 metric ton meteorite struck the earth in an empty field near Chicora, Pennsylvania |
| | 1940 - Romania cedes Bessarabia (current-day Moldova) to the Soviet Union. |
| | 1948 - Cominform circulates the "Resolution on the situation in the Communist Party of Yugoslavia" |
| | 1950 - Seoul is captured by troops from North Korea. |
| | 1956 - Anti-communist demonstrations in Poznań. Also called Poznański czerwiec (June of Poznań). |
| | 1960 - Cuba confiscates and nationalizes U.S.-owned oil refineries. |
| | 1964 - Malcom X forms the Organization of Afro-American Unity. |
| | 1967 - Israel annexes East Jerusalem. |
| | 1969 - Stonewall riots in New York city mark the beginning of the modern gay rights era. |
| | 1978 - The United States Supreme Court, in Regents of the University of California v. Bakke bars quota systems in college admissions. |
| | 1983 - The Mianus River Bridge collapses over the Mianus River in Connecticut, killing 3 drivers in their vehicles. |
| | 1988 - The worst confined-space industrial accident in U.S. history occurs at a metal-plating plant in Auburn, Indiana, killing five. |
| | 1989 - Slobodan Milošević's delivers the Kosovo Polje speech |
| | 1990 - Paperback Software found guilty by a U.S. court of copyright violation for copying the appearance and menu system of Lotus 1-2-3 in its competing spreadsheet program. |
| | 1992 - The Constitution of Estonia is signed into law. |
| | 1996 - The Constitution of Ukraine is signed into law. |
| | 2000 - Cuban exile, Elián González returns to Cuba following a Supreme Court order. |
| | 2001 - U.S. Appeals Court overturns a lower court's order to breakup Microsoft in an antitrust case. |
| | 2004 - Sovereign power is handed to the interim government of Iraq by the Coalition Provisional Authority, ending the U.S.-led rule of that nation. |
| | 2004 - Estonia, Lithuania and Slovenia join the European Exchange Rate Mechanism |
| | 2005 - Canada becomes the third country in the world to legalize same-sex marriage. |
| | 2005 - A final design for Manhattan's Freedom Tower is formally unveiled. |
| | 2006 - The Republic of Montenegro was admitted as the 192nd Member of the United Nations by General Assembly resolution 60/264. |