Aristobulus, of Cassandreia, Greek historian, accompanied Alexander the Great on his campaigns, of which he wrote an account, mainly geographical and ethnological. His work was largely used by Arrian. Cassandreia (Greek: Κασσάνδρεια; Kassandreia, modern transliteration: Kassandria) or Casssandrea was one of the most importanti cities in Ancient Macedonia founded by and named after Cassander in 316 BC located near the Ancient Greek city of Potidaea. ... A historian is a person who studies history. ... Alexander the Great fighting the Persian king Darius (Pompeii mosaic, from a 3rd century BC original Greek painting, now lost). ... Lucius Flavius Arrianus Xenophon (c 92-c 175), known in English as Arrian, was a Roman historian. ...

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• This article incorporates text from the 1911 Encyclopædia Britannica, which is in the public domain.