I find it annoying, fighting 4 confederate ironclads on the rivers in 1861, when some of them weren't built till 1862. I speak here of the Manassas, Tennesse, Arkansas and forgot, the other's name. The Manassas btw, was a ram with one gun. These ships were not that reliable or maneuverable. Can't quite envision them going up against the Union river forces in the manner they can in the game in 1861.
But at least in the winter of 61 I get the Cairo. In Chicago...with frozen rivers till the spring.
Umm, the Cairo was built outside Cairo IL in Mound City.