User:Hawkeye7/War/Selected anniversaries/October 3
- 42 BC - First Battle of Philippi: Triumvirs Mark Antony and Octavian fight an indecisive battle with Caesar's assassins Brutus and Cassius.
- 1574 - The Siege of Leiden is lifted by the Watergeuzen.
- 1935 - Italy invades Ethiopia under General de Bono (replaced November 11 by Pietro Badoglio).
- 1952 - United Kingdom successfully tests a nuclear weapon.