These heroes become available for troop leadership as they are awakened. In addition to the core force of a troop, support units are also available. Infantry may be accompanied by a cleric, for example, who can heal them as mana permits. The terrain is composed of zones, which are defined by buildings, units, etc. Your city controls a certain area depending on its current level of upgrade.
Larger cities control larger areas.
In this zone of control, your troops will automatically regenerate and supply cost will be lower than if they were in the field. Building an outpost in a strategic location accomplishes a similar goal. Zones of aggression surround your troops and those of the enemy, and when they cross combat take place. You may order your units to not engage and attempt to run by them without combat if you like. Different postures allow for better defense, offense, or just plain speed of travel.