Cavalry is at the top of the production hierarchy. While heavy cavalry is the main striking force, the light one plays mostly supportive role.

Light cavalry can cover even longer distances than heavy. Their speed and the scout skill make them perfect for reconnaissance (scout skill allows to see units in enemy armies without attacking them). Mounted archers are great to accompany the heavy cavalry on its march where infantry archers can not keep up the pace. Additionally they have swords as their secondary weapons and therefore can better protect themselves in close combat.

Another great use of the mounted archers is indirect fire which allows shooters to fire on the neighbouring cells on the global map. Mounted archers have a clear bonus here over regular ones as they have much more move and energy points and can not only inflict damage with indirect fire, but also run away.