1609 - English explorer Henry Hudson sailed down what is now known as the Hudson River.
1814 - During the War of 1812, the Battle of North Point was fought in Maryland.
1918 - During World War I, At the Battle of St. Mihiel, U.S. Army personnel operate tanks for the first time. The tanks were French-built.
1938 - In a speech, Adolf Hitler demanded self-determination for the Sudeten Germans in Czechoslovakia.
1940 - The Lascaux paintings were discovered in France. The cave paintings were 17,000 years old and were some of the best examples of art from the Paleolithic period.
1943 - During World War II, Benito Mussolini was taken by German paratroopers from the Italian government that was holding him.
1944 - U.S. Army troops entered Germany, near Trier, for the first time during World War II.
1980 - Ayatollah Ruhollah Khomeini listed four conditions for the release of American hostages taken on November 4, 1979.
1991 - The space shuttle Discovery took off on a mission to deploy an observatory that was to study the Earth's ozone layer.