…Darius escapes with his Bactrian cavalry and Greek mercenaries into Media.

Alexander may have had a great advantage in linothrax, a Kevlar-like body armor made by laminating together layers of linen.

Widely mentioned in ancient records, the main visual evidence for Alexander wearing linothrax is the famous Alexander mosaic from Pompeii, which depicts the Macedonian conquerer wearing this sort of armor.

Plutarch, in his Life of Alexander, states that Alexander wore “a breastplate of folded [or doubled] linen” at the Battle of Gaugamela.

Linothrax apparently used the flexibility of the fabric to disperse the force of the incoming arrow or other projectiles, providing ample protection under extreme conditions.

A few years after Gaugamela, when Alexander is in India and receives twenty-five thousand new suits of armor for his forces, he is described as ordering the old, worn-out suits to be burned—an indication that said armor is not made of metal but of fabric.