I've been playing this evil game all morning, but now I'm stuck. I'm in the New London/Cambridge part of story mode, and it's the sequence where the Rheinlanders "uncloak" their ships and attack you. They do this once before, but they're easy to beat that time. This second time, they have some kinda green beam weapon that's just blowing me to bits. Is there some special strategy I should take, or do I just run away? I don't think I can actually beat them all.