Battle of Gaugamela main Persian infantry was poorly trained and equipped in comparison to Alexander's pezhetairoi and hoplites. The only respectable infantry Darius had were his 2,000 Greek hoplites and his personal bodyguard, the 10,000 Immortals. The Greek mercenaries fought in a phalanx, armed not with a heavy shield but with spears no longer than three metres, while the spears of the Immortals were two metres long. Among the other Persian troops, the most heavily armed were the Armenians, who were armed the Greek way and probably fought as a phalanx. The rest of Darius' contingents were much more lightly armed; the main
Thracian clothing common in many nations. In the north only noble Thracians, the "Zibythides" and noble Dacians, the "Pileati", would wear caps. Despite this Herodotus writes that all Thracians in the Persian army wore foxskin caps and multicoloured mantles. Northern tribes in general, both Thracians and Daco-Getians, wore clothes similar to Scythians. The Thracians at Pydna in 168 BC wore black tunics. The Kausia (Ancient Greek: Καυσία) was adopted from the Macedonians. Although many Thracian tribes began to incorporate Greek garbs to their fashion, they still largely retained their own styles of clothing. Thracian clothing Thracian clothing refers to types of clothing