GAIUS OPPIUS, an intimate friend of Julius Caesar.
According to Suetonius (Caesar, 56), many authorities considered Oppius to have written the histories of the Spanish, African and Alexandrian wars which are printed among the works of Caesar.
It is now generally held that he may possibly be the author of the last (although the claims of Hirtius are considered stronger), but certainly not of the two first, although Niebuhr confidently assigned the Bellum Africanum to him; the writer of these took an actual part in the wars they described, whereas Oppius was in Rome at the time.
One of the most interesting documents in the correspondence is a despatch of Caesar to his agent Oppius, written in great haste and in disjointed sentences.
Of the continuations of Caesar's Commentaries - the eighth book of the Gallic war, the history of the Alexandrian, African and Spanish wars - the first is generally allowed to be by Hirtius; the Alexandrian war is perhaps by him (or Oppius); the last two are supposed to have been written at his request, by persons who had taken part in the events described, with a view to subsequent revision and incorporation in his proposed work on military commanders.