The core of the Seleucid army were Hellenistic units, many of which were descendants of Alexanders Makedonian troops. The phalangites were armed with a long pike (the sarissa) up to 21 feet in length and balanced with a heavy bronze butt spike. They wear linen or similar body armour and carry a small shield called a pelta. Officers and front rankers may have wore metal cuirass body armour. Phalangites continued to wear the bronze or iron Macedonian style helmets.
Figures 10mm Magister Militum.