The Greek and Persians at war 500 - 323 BC osprey met at arms series....

These arcers where mercenaries ans, part from the scythian archers were the only troops to be hired by Athenians as regular infantry.
They were employed in the same capacity as slingers and other light troops, either as psiloi or positionedamong the hoplite heavy infantry.
Their distinctive charateristic was the red chiton tunic.
They wore no body armour and their only protection was the small round bronze shield pelta.
As well as bow and quiver of arrows it is possible that they also carried javelins.