Combat
Hetman's Aura
A visual circle around your Commander. Units within the aura deal more damage and regenerate health much faster, as long as they are not currently engaged in combat.
Veterancy
Units gain experience (XP) during combat. Higher levels (ranks 1-3) grant significantly more HP and attack power. Preserving your veterans is key to late-game victory.
Healing
Troops regenerate strength when they haven't been in combat for several seconds. Retreating and rotating your front line allows you to preserve valuable experienced units.