42 BC

{{yearbox|

 in?= |
 cp=2nd century BC |
 c=1st century BC |
 cf=1st century 
 yp1=45 BC |
 yp2=44 BC |
 yp3=43 BC |
 year=42 BC |
 ya1=41 BC |
 ya2=40 BC |
 ya3=39 BC 
 dp3=70s BC |
 dp2=60s BC |
 dp1=50s BC |
 d=40s BC |
 dn1=30s BC |
 dn2=20s BC |

dn3=10s BC |

Events

*October 3 - First Battle of Philippi: The Triumvirs Mark Antony and Octavian fight an indecisive battle with Caesar's assassins Marcus Junius Brutus and Cassius. Although Brutus defeats Octavian, Antony defeats Cassius, who committed suicide.
*October 23 - Second Battle of Philippi: Brutus' army is decisively defeated by Antony and Octavian, he committed suicide soon after.

Births

*November 16 - Tiberius, Roman emperor

Deaths

*October 3 - Gaius Cassius Longinus, assassin of Julius Caesar (suicide)
*October 23 - Marcus Junius Brutus, protege and assassin of Julius Caesar (suicide)
*Gaius Antonius - brother of Mark Antony