Wikipedia:Selected anniversaries/August 3
- 1492 - Christopher Columbus set sail from Palos de la Frontera, Spain.
- 1492 - The Jews were expelled from Spain by the Catholic Monarchs.
- 1914 - World War I: Germany declared war against France.
- 1960 - Niger gained independence from France.
- 1972 - The U.S. Senate ratified the Anti-Ballistic Missile Treaty.