Wyoming became the 44th state to join the United States of America.
Source
The Battle of Dyrrhachium occurred.
Lady Jane Grey began her 9-day reign as the Queen of England, France, and Ireland.
West Virginia had its hottest day on record at a sweltering 112°F (44°C).
Louis XVI of France declared war on Great Britain during the American Revolution.
A chemical factory in Seveso, near Milan, Italy, exploded, covering surrounding areas in dioxin.
