91 BC
Year 91 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Philippus and Caesar (or, less frequently, year 663 Ab urbe condita) and the Second Year of Zhenghe. The denomination 91 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. Events By place Roman Republic Consuls: Sextus Julius Caesar and Lucius Marcius Philippus. The tribune Marcus Livius Drusus proposes extending Roman citizenship to allied Italian cities, but is assassinated, leading to the Social War. China Witchcraft Trials Emperor Wu of Han executes Prime Minister Gongsun He (the brother-in-law of Empress Wei Zifu) and his clan because Gongsun's son is accused of adultery with the emperor's daughter Princess Yangshi and witchcraft. Following further accusations of witchcraft, the emperor executes hundreds of imperial officials and concubines. After convincing the emperor that his ill health is caused by witchcraft, the prosecutor Jiang Chong is given charge of investigating the matter. People accuse each other of witchcraft, and tens of thousands are executed across China, including former generals Zhao Ponu and Gongsun Ao.