Christopher Columbus arrives in the Canary Islands on his first voyage to the New World.
Joseph Lister, British surgeon and scientist, performs 1st antiseptic surgery.
World War I: The United Kingdom declares war on Austria-Hungary; the countries of the British Empire follow suit.
Waffen-SS troops massacre 560 people in Sant'Anna di Stazzema.
Nazi German troops end the week-long Wola massacre, during which time at least 40,000 people were killed indiscriminately or in mass executions.
Korean War: Bloody Gulch massacre: American POWs are massacred by North Korean Army.
South Africa is banned from the Olympic Games due to the country's racist policies.
Between 1,000 and 3,500 Palestinians are killed in the Tel al-Zaatar massacre, one of the bloodiest events of the Lebanese Civil War
Major League Baseball players go on strike, forcing the cancellation of the 1994 World Series.