We have Polybios to thank for the phrase 'imitation Legionaries' or 'Agyraspidai equipped in the Roman fashion' It has also been pointed out that Antiochos IV was impressed with Roman martial prowess and so began to copy some Roman ideas, including a temple of JOM in Antioch. But it could be that Polybios is describing Thorakitai essentially soldiers carrying Thureos, spear and swords wearing mail