Wikipedia:Selected anniversaries/July 20
July 20: Independence Day in Colombia (1810); Friends' Day in Argentina and other Latin American countries.
- 1402 - Forces under Timur defeated the Ottomans in the Battle of Ankara and captured Sultan Bayezid I.
- 1866 - The Austrian Navy led by Wilhelm von Tegetthoff defeated a much larger Italian fleet in the Battle of Lissa.
- 1944 - Claus von Stauffenberg and others in the German Resistance attempted to assassinate Adolf Hitler.
- 1969 - The Apollo 11 lunar module landed on the Sea of Tranquillity, where Neil Armstrong and Buzz Aldrin (pictured) became the first men to walk on the moon.
- 1976 - The Viking 1 spacecraft landed on Mars.