On June 30:
1422 Battle of Arbedo between the duke of Milan and the Swiss cantons.
1520 The Spaniards were expelled from Tenochtitlan.
1559 King Henry II of France was seriously injured in a jousting match against Gabriel de Montgomery.
1651 The Deluge: Khmelnytsky Uprising – the Battle of Beresteczko ended with a Polish victory.
1688 The Immortal Seven issued the Invitation to William, continuing the struggle for English independence from Rome.
1758 Seven Years’ War: The Battle of Domstadtl.
1859 French acrobat Charles Blondin crossed Niagara Falls on a tightrope.
1860 The 1860 Oxford evolution debate at the Oxford University Museum of Natural History.
1864 U.S. President Abraham Lincoln granted Yosemite Valley to California for “public use, resort and recreation”.
1882 Charles J. Guiteau was hanged for the assassination of President James Garfield.
1886 The first transcontinental train trip across Canada departs from Montreal.
1905 Albert Einstein published the article “On the Electrodynamics of Moving Bodies”, in which he introduced special relativity.
1908 The Tunguska explosion in SIberia – commonly believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3.1–6.2 mi) above the Earth’s surface.
1912 The Regina Cyclone hit Regina, Saskatchewan, killing 28.
1917 Susan Hayward, American actress, was born (d. 1975).
1917 – Lena Horne, American singer and actress (d. 2010)
1934 The Night of the Long Knives, Adolf Hitler’s violent purge of his political rivals took place.
1935 The Senegalese Socialist Party held its first congress.
1936 Emperor Haile Selassie of Abbysinia appealled for aid to the League of Nations against Mussolini’s invasion of his country.
1939 The first edition of the New Zealand Listener was published.
1941 World War II: Operation Barbarossa – Germany captured Lviv, Ukraine.
1943 Florence Ballard, American singer (The Supremes). was born (d. 1976).
1944 Glenn Shorrock, Australian singer-songwriter (Little River Band) was born.
1944 World War II: The Battle of Cherbourg ended with the fall of the strategically valuable port to American forces.
1950 Leonard Whiting, British actor, was born.
1953 Hal Lindes, British-American musician (Dire Straits) was born.
1953 The first Chevrolet Corvette rolled off the assembly line in Flint, Michigan.
1956 A TWA Super Constellation and a United Airlines DC-7 (Flight 718) collided above the Grand Canyon killing all 128 on board the two planes.
1959 A United States Air Force F-100 Super Sabre from Kadena Air Base, Okinawa, crashed into a nearby elementary school, killing 11 students plus six residents from the local neighborhood.
1960 Murray Cook, Australian singer (The Wiggles) was born.
1960 Congo gained independence from Belgium.
1962 Julianne Regan, British singer and musician (All About Eve), was born.
1966 Mike Tyson, American boxer, was born.
1966 Marton Csokas, New Zealand actor, was born.
1968 Credo of the People of God by Pope Paul VI.
1969 Nigeria banned Red Cross aid to Biafra.
1971 – Ohio ratified the 26th Amendment to the U.S. Constitution, lowering the voting age to 18, thereby putting the amendment into effect.
1972 The first leap second was added to the UTC time system.
1985 Thirty-nine American hostages from a hijacked TWA jetliner were freed in Beirut after being held for 17 days.
1986 The U.S. Supreme Court ruled that states can outlaw homosexual acts between consenting adults.
1987 The Royal Canadian Mint introduced the $1 coin, known as the Loonie.
1990 East and West Germany merged their economies.
1991 32 miners were killed when a coal mine fire in the Donbass region of the Ukraine released toxic gas.
1992 Former Prime Minister Margaret Thatcher joined the House of Lords as Baroness Thatcher.
1997 The United Kingdom transferred sovereignty over Hong Kong to China.
2007 A car crashed into Glasgow International Airport in an attempted terrorist attack.
2009 Yemenia Flight 626 crashed off the coast of Moroni, Comoros killing 152 people and leaving 1 survivor.
Sourced from NZ History Online & Wikipedia