- 1713 - Emperor Charles VI issued the Pragmatic Sanction to ensure that the Habsburg monarchy would be inherited by his daughter, Maria Theresa.
- 1775 - The American Revolutionary War began with the Battle of Lexington and Concord.
- 1943 - World War II: German troops entered the Warsaw Ghetto to round up Jews.
- 1971 - The first space station, Salyut 1, was launched.
- 1995 - Oklahoma City bombing: A car bomb was detonated in front of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, killing 168 people.
- 1713 - Emperor Charles VI issued the Pragmatic Sanction to ensure that the Habsburg monarchy would be inherited by his daughter, Maria Theresa.
- 1775 - The American Revolutionary War began with the Battle of Lexington and Concord.
- 1943 - World War II: German troops entered the Warsaw Ghetto to round up Jews.
- 1971 - The first space station, Salyut 1, was launched.
- 1995 - Oklahoma City bombing: A car bomb was detonated in front of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, killing 168 people.