Federation Zones are defensive gameplay areas where you fight off waves of enemy attacks.
In these zones, you battle against Federation Captains who lead enemy forces. Each time you defeat them, they retreat but return stronger for the next attack. This continues for a total of 21 battles before they stop completely.
With every victory, the enemy becomes tougher, increasing the challenge and requiring stronger units and better strategy.
Defending Federation Zones successfully helps strengthen your commanders and gives you valuable rewards, making it an important feature for improving your overall power.