1500 - Portuguese navigator Pedro Alvares Cabral discovered Brazil.
1509 - Henry VIII ascended to the throne of England upon the death of his father Henry VII.
1529 - Spain and Portugal divided the eastern hemisphere in Treaty of Saragosa.
1745 - The Peace of Fussen was signed, restoring the status quo of Germany.
1792 - U.S. President George Washington proclaimed American neutrality in the war in Europe.
1915 - At the Second Battle Ypres the Germans became the first country to use poison gas.
1918 - British naval forces attempted to sink block-ships in the German U-boat bases at the Battle of Zeeburgge.
1944 - During World War II, the Allies launched a major attack against the Japanese in Hollandia, New Guinea.
1952 - An atomic test conducted in Nevada was the first nuclear explosion shown on live network television.
2005 - Zacarias Moussaoui plead guilty to conspiring with hijackers in the September 11, 2001, plot to attack American buildings and citizens.