Marcus Fulvius Flaccus and Gaius Gracchus become tribunes and propose a number of radical reforms in Rome.
Gracchus passes a law requiring the state to provide weapons and equipment for the soldiers in the Roman army.
Liu An, Chinese prince, geographer, and cartographer (b. 179 BC)
122 BC Wikipedia
Year 122 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Ahenobarbus and Fannius (or, less frequently, year 632 Ab urbe condita). The denomination 122 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.