First off, I'd like to compliment the AGEOD team on creating what is without doubt one of the finest computer war games out there. With the 1.15 patch, I've become immersed once again in this classic.
My question is a simple one: When bombarding fortresses with naval elements, is the power cumulative? I have a huge force of Union ships--monitors, steam frigates, etc--trying to soften up the forts outside Charleston, but I'm wondering if I'm wasting the effort. Do larger naval forces bring commensurately larger destruction to fortresses, or should I stick to a smaller force of heavier ships?