01-15-2018, 08:16 AM
The terms "heavy" and "light" have nothing to do with equipment; they refer to how the unit is deployed. A naked man with a shield and spear is classed as heavy infantry if he is fighting in a phalanx. A fully armoured cataphract is classed as light cavalry if he is used for skirmishing or scouting.
Author: Bronze Age Military Equipment, Pen & Sword Books