Hetairenreiterei
The Companion cavalry of the Diadochoi (Alexandrian successor-states), were even more heavily equipped. Seleucid Companions were noted to have worn lighter, but not otherwise dissimilar, equipment to the cataphracts at the Battle of Magnesia in 190 BC, which may have included partial horse armour and leg and arm protection. Ptolemaic Companions and Antigonid Companions were also equipped with a large round "aspis" cavalry shield unlike the Companions of Phillip and Alexander.