On June 15:
1184 King Magnus V of Norway was killed at the Battle of Fimreite.
1246 With the death of Duke Frederick II, the Babenberg dynasty ended in Austria.
1389 Battle of Kosovo: The Ottoman Empire defeated Serbs and Bosnians.
1580 Philip II of Spain declared William the Silent to be an outlaw.
1623 Cornelis de Witt, Dutch politician, was born (d. 1672).
1752 Benjamin Franklin proved that lightning was electricity.
1776 Delaware Separation Day – Delaware voted to suspend government under the British Crown and separate officially from Pennsylvania.
1785 Jean-François Pilâtre de Rozier, co-pilot of the first-ever manned flight (1783), and his companion, Pierre Romain, became the first-ever casualties of an air crash when their hot air balloon exploded during their attempt to cross the English Channel.
1804 New Hampshire approved the Twelfth Amendment to the United States Constitution, ratifying the document.
1808 Joseph Bonaparte became King of Spain.
1836 Arkansas was admitted as the 25th U.S. state.
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: The Siege of Petersburg began.
1864 Arlington National Cemetery was established when 200 acres (0.81 km2) around Arlington Mansion (formerly owned by Confederate General Robert E. Lee) were 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.
1888 Crown Prince Wilhelm became Kaiser Wilhelm II and is the last emperor of the German Empire.
1896 The most destructive tsunami in Japan’s history killed more than 22,000 people.
1904 A fire aboard the steamboat SS General Slocum in New York City‘s East River killed 1000.
1909 Representatives from England, Australia and South Africa met at Lord’s and formed the Imperial Cricket Conference.
1910 David Rose, American songwriter, composer and orchestra leader, was born (d. 1990).
1911 W.V. Awdry, British children’s writer, was born (d. 1997).
1911 Tabulating Computing Recording Corporation (IBM) was incorporated.
1913 The Battle of Bud Bagsak in the Philippines concluded.
1916 U.S. President Woodrow Wilson signed 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 completed the first nonstop transatlantic flight at Clifden, County Galway.
1920 Duluth lynchings in Minnesota.
1920 A new border treaty between Germany and Denmark gave northern Schleswig to Denmark.
1934 The U.S. Great Smoky Mountains National Park was founded.
1935 Jack Lovelock won the “Mile of the Century“.
1943 Muff Winwood, British songwriter and bassist (Spencer Davis Group), was born.
1944 World War II: Battle of Saipan: The United States invaded Saipan.
1945 The General Dutch Youth League (ANJV) was founded in Amsterdam.
1949 – Simon Callow, British actor, was born.
1949 – Russell Hitchcock, Australian singer (Air Supply), was born.
1954 UEFA (Union des Associations Européennes de Football) was formed in Basle.
1955 The Eisenhower administration stages the first annual “Operation Alert” (OPAL) exercise, an attempt to assess the USA’s preparations for a nuclear attack.
1959The Chinese Gooseberry was renamed kiwifruit.
1963 Helen Hunt, American actress, was born.
1971 Nathan Astle, New Zealand cricketer, was born.
1973 Pia Miranda, Australian actress, was born.
1982 Mike Delany, All Black, was born.
1985 Rembrandt’s painting Danaë was attacked by a man (later judged insane) who threw sulfuric acid on the canvas and cuts it twice with a knife.
1991 Birth of the first federal political party in Canada that supported Quebec nationalism, le Bloc Québécois.
1992 The United States Supreme Court ruled in United States v. Álvarez-Machaín that it was 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.
1996 The Provisional Irish Republican Army exploded a large bomb in the middle of Manchester.
2002 Near earth asteroid 2002 MN missed the Earth by 75,000 miles (121,000 km), about one-third of the distance between the Earth and the Moon
Sourced from NZ History Online & Wikipedia.