Various dates have been given for Tatian's Oration to the Greeks, ranging from 152 to 172. None of these dates is correct, since the treatise was written after the year 176, perhaps in 177 or 178.
In the spring of 175 the Roman empire was shaken by the almost accidental revolt of Avidius Cassius, governor of Syria. Acting on the rumor that Marcus Aurelius had died, the governor proclaimed himself emperor. Egypt joined Cilicia, Syria, and Judaea; but the revolt was crushed in little more than three months. The emperor promised clemency (coins of the following year mention Clementia Aug.) and kept his promise. He then made a journey to the east with the empress Faustina and their son Commodus, passing through Syria but avoiding Antioch, the center of the revolt. Early in 176, after wintering in Alexandria, they visited Antioch and went on to Cappadocia, where Faustina's sudden death was followed by a magnificent funeral.