1 April 1861

An American Lockheed EP-3 and a Chinese Shenyang J-8 collided in mid-air off Hainan, resulting in an international dispute between the two countries.

The longest prison riot in British penal history began at Strangeways Prison in Manchester, lasting 25 days.

Steve Jobs and Steve Wozniak founded Apple Computer, Inc. (first logo pictured).

A man ignited tires in the crater of Mount Edgecumbe, prompting a false eruption scare later revealed as an April Fools' hoax.

U.S. president Richard Nixon signed the Public Health Cigarette Smoking Act into law, requiring that a prominent warning by the surgeon general be placed on cigarette packages.

The American Motors Corporation introduced its Gremlin, promoted as America's first subcompact car.

The Hawker Siddeley Harrier, the first operational fighter aircraft with V/STOL capabilities, entered service with the Royal Air Force.

On Her Majesty's Secret Service, the tenth novel of Ian Fleming's James Bond series, was released in the United Kingdom.

Israel enacted a citizenship law, prior to which the country technically had no citizens.

English cricketer Wally Hammond set a record for the highest individual score in Test cricket of 336 not out during a match against New Zealand.

Under the South Seas Mandate, Japan set up a government in Koror, precipitating large-scale Japanese settlement in Palau.

The United Kingdom established the Royal Air Force, near the end of the First World War.

The Inland Customs Line, established by the British for the collection of the salt tax in India, was abandoned.

The Duke of Buckingham opened the first section of the Brill Tramway, a short railway line to transport goods between his lands and the national rail network.

American Civil War: The Union Army under Major General Philip Sheridan (pictured) inflicted more than 2,900 casualties on the Confederates at the Battle of Five Forks.

Mexican Texans met at San Felipe de Austin to begin the Convention of 1833.

Hundred Years' War: John, Duke of Normandy, laid siege to the town of Aiguillon.

A band of warriors led by Niels Ebbesen killed Count Gerhard III, ending Holstein rule in Denmark.

Richard Marshal, Earl of Pembroke, was defeated by knights loyal to King Henry III of England at the Battle of the Curragh in County Kildare, Ireland.

The Artemis II lunar flyby mission launches, marking the first crewed flight above low Earth orbit since Apollo 17 in 1972.

The 2016 Nagorno-Karabakh conflict begins along the Nagorno-Karabakh Line of Contact.

Serious Organised Crime Agency (SOCA) of the Government of the United Kingdom is enforced, but later merged into National Crime Agency on 7 October 2013.

Google launches its Email service Gmail.

An EP-3E United States Navy surveillance aircraft collides with a Chinese People's Liberation Army Shenyang J-8 fighter jet. The Chinese pilot ejected but is subsequently lost. The Navy crew makes an emergency landing in Hainan, China and is detained.