Not all thorakitai looked like romans, they were more like versatile heavly armored troops with thureos (oval celtic shields), celtic chain mail/ eastern scale mail, thrusting spear and javelins, who could skirmish, act as shock troops and also fight in a very effective (hoplite style) phalanx, a natural development from Thureophoroi, a mix from hoplites and peltastai with thracian and celtic influences, roman influence came only later.