In this detail of the army of Xerxes I (above), we see men from all the regions of his empire with distinct dress and headwear and weapons. (Top row, left to right): Persian, Median, Elamite, Parthian, Arian, Bactrian, Sogdian, Choresmian, Zarangian, Arachosian, Sattagydian, Gandharan, Hindush, Saka Haumavarga. (Bottom row, left to right): Saka Tigaxrauda, Babylonian, Assyrian, Arab, Egyptian, Armenian, Cappadocian, Lydian, Ionian, Overseas Saka, Skudrian, Ionian (or this may be a Macedonian as he is wearing a petasos hat), Libyan, Ethiopian.
To the left and right of this are a soldier of the Maka and the Carians. On the tomb of Darius, probably completed by Xerxes, the Babylonian soldier is presented unarmed. Bearing arms in the presence of the king was a sign of trust so this depiction may reflect…