This is one of the several Veteran Factors that control the bonuses given by VeteranAbilities and EliteAbilities. VeteranCombat is a straight multiplier to the base Damage inflicted by the weapon of units that benefit from the FIREPOWER promotional bonus. Contrary to popular belief, these bonuses do not stack, meaning that a FIREPOWER elite bonus will not further increase the damage dealt by a unit with a FIREPOWER veteran bonus.
Example: if the unit's weapon deals 100 base Damage, then the hit would be increased to 110 (assuming VeteranCombat=1.1).
- 100 * 1.1 = 110.