|Millennium:||1st millennium BC|
|112 BC by topic|
Year 112 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Drusus and Caesoninus (or, less frequently, year 642 Ab urbe condita). The denomination 112 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Asian Silk Road opens.
- Soldiers are dispatched from Han Dynasty China to Nanyue for the Han–Nanyue War during the dynasty's southward expansion.