Thraex
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The thraex or Thracian was a type of Roman gladiator, armed in the Thracian style with small rectangular shield and a sword. He and the hoplomachus, with his Greek equipment, were usually pitted against the murmillo, armed like a legionary, mimicking the opposition between Roman soldiers and their various non-Italian enemies.
Thraex were armed with a long slightly curved blade, with the intention of maiming an opponent's unarmored back.