To Arms! Golden Age:
Unlock a special Casus Belli which generates 75% less Grievances than Formal War and can be used immediately after Denouncing the target. +30% Production towards military units.
Normal Age
To Arms! Dedication Bonus:
Gain +1 Era Score each time you kill a non-Barbarian Corps in combat and +2 Era Score each time you kill a non-Barbarian Army in combat.
Dark Age
To Arms! Dedication Bonus:
Gain +1 Era Score each time you kill a non-Barbarian Corps in combat and +2 Era Score each time you kill a non-Barbarian Army in combat.