40s BC

Centuries: 2nd century BC - 1st century BC - 1st century

Decades: 90s BC - 80s BC - 70s BC - 60s BC - 50s BC - 40s BC - 30s BC - [20s BC]? - [10s BC]? - 0s BC - 0s

Years: 49 BC 48 BC [47 BC]? [46 BC]? [45 BC]? 44 BC 43 BC [42 BC]? [41 BC]? 40 BC

• Civil war in Roman Republic between Julius Caesar and forces of the Senate