Decades: 150s BC 140s BC 130s BC 120s BC 110s BC - **100s BC** - 90s BC 80s BC 70s BC 60s BC 50s BC

Years: 110 BC 109 BC 108 BC 107 BC 106 BC - **105 BC** - 104 BC 103 BC 102 BC 101 BC 100 BC

- October 6 - The Battle of Arausio, where the Cimbri destroy two Roman armies on the Rhone, the most severe defeat of Roman forces since the Battle of Cannae.