Wikipedia:Selected anniversaries/April 30
On April 30:
- 313 - Roman Emperor Licinius unified the entire eastern half of the empire under his rule.
- 1789 - George Washington became the first elected President of the United States.
- 1812 - Louisiana was admitted as the 18th U.S. state.
- 1948 - The Organization of American States was established in Bogotá.
- 1975 - North Vietnamese troops took Saigon, ending the Vietnam War.