350 – Roman usurper Nepotianus, of the Constantinian dynasty, is defeated and killed by troops of the usurper Magnentius, in Rome.
1422 – Battle of Arbedo between the duke of Milan and the Swiss cantons.
1520 – Spanish conquistadors led by Hernán Cortés fight their way out of Tenochtitlan.
1559 – King Henry II of France is mortally wounded in a jousting match against Gabriel de Montgomery.
1651 – The Deluge: Khmelnytsky Uprising – the Battle of Beresteczko ends with a Polish victory.
1688 – The Immortal Seven issue the Invitation to William (continuing the English rebellion from Rome), which would culminate in the Glorious Revolution.
1758 – Seven Years' War: The Battle of Domstadtl takes place.
1794 – Native American forces under Blue Jacket attack Fort Recovery.
1805 – The U.S. Congress organizes the Michigan Territory.
1859 – French acrobat Charles Blondin crosses Niagara Falls on a tightrope.
1860 – The 1860 Oxford evolution debate at the Oxford University Museum of Natural History takes place.
1864 – U.S. President Abraham Lincoln grants Yosemite Valley to California for "public use, resort and recreation".
1882 – Charles J. Guiteau is hanged in Washington, D.C. for the assassination of U.S. President James Garfield.
1886 – The first transcontinental train trip across Canada departs from Montreal. It arrives in Port Moody, British Columbia on July 4.
1905 – Albert Einstein publishes the article On the Electrodynamics of Moving Bodies, in which he introduces special relativity.
1906 – The United States Congress passes the Meat Inspection Act and Pure Food and Drug Act.
1908 – The Tunguska event occurs in remote Siberia.
1912 – The Regina Cyclone hits Regina, Saskatchewan, killing 28. It remains Canada's deadliest tornado event.
1921 – U.S. President Warren G. Harding appoints former President William Howard Taft Chief Justice of the United States.
1922 – In Washington D.C., U.S. Secretary of State Charles Evans Hughes and Dominican Ambassador Francisco J. Peynado sign the Hughes-Peynado agreement, which ends the United States occupation of the Dominican Republic.
1934 – The Night of the Long Knives, Adolf Hitler's violent purge of his political rivals in Germany, takes place.
1935 – The Senegalese Socialist Party holds its first congress.
1936 – Emperor Haile Selassie of Abyssinia appeals for aid to the League of Nations against Italy's invasion of his country.
1937 – The world's first emergency telephone number, 999, is introduced in London
1944 – World War II: The Battle of Cherbourg ends with the fall of the strategically valuable port to American forces.
1953 – The first Chevrolet Corvette rolls off the assembly line in Flint, Michigan.
1956 – A TWA Super Constellation and a United Airlines DC-7 (Flight 718) collide above the Grand Canyon in Arizona, United States, killing all 128 on board the two planes.
1959 – A United States Air Force F-100 Super Sabre from Kadena Air Base, Okinawa, crashes into a nearby elementary school, killing 11 students plus six residents from the local neighborhood.
1960 – Congo gains independence from Belgium.
1963 – Ciaculli massacre: a car bomb, intended for Mafia boss Salvatore Greco, kills seven police officers and military personnel near Palermo.
1966 – The National Organization for Women, the United States' largest feminist organization, is founded.
1968 – Pope Paul VI issues the Credo of the People of God.
1969 – Nigeria bans Red Cross aid to Biafra.
1971 – The crew of the Soviet Soyuz 11 spacecraft are killed when their air supply escapes through a faulty valve.
1971 – Ohio ratifies the 26th Amendment to the U.S. Constitution, reducing the voting age to 18, thereby putting the amendment into effect.
1972 – The first leap second is added to the UTC time system.
1977 – The Southeast Asia Treaty Organization disbands.
1985 – Thirty-nine American hostages from the hijacked TWA Flight 847 are freed in Beirut after being held for 17 days.
1986 – The U.S. Supreme Court rules in Bowers v. Hardwick that states can outlaw homosexual acts between consenting adults.
1987 – The Royal Canadian Mint introduces the $1 coin, known as the Loonie.
1990 – East Germany and West Germany merge their economies.
1991 – 32 miners are killed when a coal mine catches fire in the Donbass region of Ukraine and releases toxic gas.
1997 – The United Kingdom transfers sovereignty over Hong Kong to the People's Republic of China.
2009 – Yemenia Flight 626 crashes into the Indian Ocean, near Comoros, killing all but one of the 153 passengers and crew on board.

Holidays and observances

Army Day (Guatemala)
Christian Feast Day:
Martial
Theobald of Provins
First Martyrs of the Church of Rome
June 30 (Eastern Orthodox liturgics)
General Prayer Day (Central African Republic)
Independence Day, celebrates the independence of Democratic Republic of the Congo from Belgium in 1960.
Philippine–Spanish Friendship Day (Philippines)

For details, contact Datacentre