Skills

Skill Statistics
Skills only affect the army the hero is traveling in. The only exception to this is logistics; which affects the whole campaign.

Multiple Heroes
Only three heroes with the same skill can be effectively used in an army. Note: Any additional heroes have no effect.
 * The first hero uses the skill at 100%,
 * The second hero works at 60%,
 * The third hero works at 20%,

For instance, If you have three heroes in an army with master archery, the archery bonus is better than with 1 hero. However, it is less than 3x the bonus. if you add another hero with master archery, it will make no difference.