The large-scale battle system in Age of Magic has been designed to be able to cope with a wide range of different battle situations. At the smallest scale, it can cope with a large skirmish, where each individual combatant is critical. At the largest scale, it can cope with a vast siege involving thousands of combatants.
Smaller battles tend to resolve faster than larger battles. The Age of Magic battle system allows for this by using a flexible time unit, the battle turn. The battle will be resolved in battle turns; each battle turn, the commanders issue orders to troops and casualties are resolved.
The time duration of a battle turn depends on the nature and scale of the battle in question, as follows:
| Nature of battle | Scale of battle (i.e. number of combatants on each side) | Duration of each battle turn |
| Open battle | Large skirmish (20 - 50) | 1 minute |
| Small battle (50 - 500) | 10 minutes | |
| Large battle (More than 500) | 1 hour | |
| Siege | More than 20 | 1 day |