John Henry Arthur Hart, 1911 Encyclopædia Britannica, Volume 15… (1911)
“ The Jewish War (Περὶ τοῦ Ἰουδαϊκοῦ πολέμου) , the oldest of Josephus’ extant writings, was written towards the end of Vespasian’s reign (69–79) . The Aramaic original has not been preserved; but the Greek version was prepared by Josephus himself in conjunction with competent Greek scholars. Its purpose in all probability was, in the first instance, to exhibit to the Babylonian Jews the overwhelming power of Rome and so to deter them from repeating the futile revolt of the Jews of Palestine. ”
