Year 21 (XXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events By place Roman Empire Revolt of the Aedui under Julius Florus and Julius Sacrovir, suppressed by Gaius Silius. Tiberius's a Roman Consul for the fourth time. Beginning of the revolt in Africa led by Tacfarinas. The Romans create a buffer state in the territory of the Quadi in southern Slovakia. A barracks's constructed for the Praetorian Guard on the Quirinal. Asia… (More on 21)