1413 – Henry V becomes King of England.
1871 – Otto von Bismarck is appointed Chancellor of the German Empire.
1918 – World War I: The first phase of the German Spring Offensive, Operation Michael, begins.
1925 – The Butler Act prohibits the teaching of human evolution in Tennessee.
1928 – Charles Lindbergh is presented with the Medal of Honor for the first solo trans-Atlantic flight.
1933 – Construction of Dachau, the first Nazi concentration camp, is completed.
1935 – Shah of Iran Reza Shah Pahlavi formally asks the international community to call Persia by its native name, Iran, meaning “Land of the Aryans”.
1937 – Ponce Massacre: Nineteen people in Ponce, Puerto Rico, are gunned down by a police squad acting under orders of US-appointed Governor, Blanton C. Winship.
1943 – Wehrmacht officer Rudolf von Gersdorff plots to assassinate Adolf Hitler by using a suicide bomb, but the plan falls through. Von Gersdorff is able to defuse the bomb in time and avoid suspicion.
1945 – World War II: Operation Carthage: Royal Air Force planes bomb Gestapo headquarters in Copenhagen, Denmark. They also hit a school and 125 civilians are killed.
1960 – Apartheid in South Africa: Massacre in Sharpeville, South Africa: Police open fire on a group of unarmed black South African demonstrators, killing 69 and wounding 180.
1963 – Alcatraz, a federal penitentiary on an island in San Francisco Bay, closes.
1965 – Dr. Martin Luther King, Jr. leads 3,200 people on the start of the third and finally successful civil rights march from Selma to Montgomery, Alabama.
1980 – US President Jimmy Carter announces a United States boycott of the 1980 Summer Olympics in Moscow to protest the Soviet war in Afghanistan.
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