Translations:Buildings/6/en
From Rival Regions Wiki
You should see damage formula for more info.
Sea port
This building can be built only in regions with sea access. Just like Missile system, it can lower attacking side damage in Sea wars.
Power plant
This building provides independent regions or states with electricity, that is needed to power other buildings. You can see Power plant output info on state page. In case of shortage of power all buildings in the state/independent region will work with a penalty.