1858: The first of a series of debates begins between Abraham Lincoln and Stephen Douglas. Douglas goes on to win the Senate seat in November, but Lincoln gains national visibility for the first time.
1911: The Mona Lisa, the famous painting by Leonardo da Vinci, is stolen from the Louvre in Paris, where it had hung for more than 100 years. It is recovered in 1913.
1915: Italy declares war on Turkey.
1944: The Dumbarton Oaks Conference, which lays the foundation for the establishment of the United Nations, is held in Washington, D.C.
1963: The South Vietnamese Army arrests over 100 Buddhist monks in Saigon.
1968: Soviet forces invade Czechoslovakia because of the country’s experiments with a more liberal government.
1988: A ceasefire is declared in the 8-year war between Iran and Iraq.
2001: NATO decides to send a peacekeeping force to the former Yugoslav Republic of Macedonia.