I usually end up playing as the CSA. That means i have one big problem. The river. Forts alone don't seem to do it. Certainly not without improvement. Question is, is it worthwhile building more guns for the forts?
The river is too long to garrison all the cities along it, so i can't see that working. A reaction force might be able to throw small - medium size invasion forces back, but that means less forces on the front lines.
Gun boats are cheap enough, but the Yankees always seem to have more of them. Ironclads are expensive and take a long time to build. Cotton clads are more expensive than gun boats, but again are quite expensive.
So, fellow Rebs - how do you defend the Mississippi?