Two quick questions:
First, what percentage levels of control, both military and political, are required to build a fort in a region? I can't find an answer to this in the manual. I have been trying with no success as the Union to build a fort in Frederick, MD to thwart the non-stop Confederate raids that launch through that region and generally dont end until the Canadian border months later. My military control is 100 percent there, my political is 47%, and I cant build a fort.
Second, about river crossings. The manual states land units can cross shallow waters at a cost, major rivers at a severe penalty, and minor rivers/ferrys/bridges at a moderate cost. Yet rebel raiders seem to be able to cross the Mississippi and Ohio at will, even though I have gunboats all over the place attempting to block their movement. Are the major rivers crossable everywhere? Also, what is the best way to interdict movement besides gunboats? As the Union, I am growing tired of chasing down ahistorical confederate cavalry raids all over the Midwest, that last for months at a time.
Finally, one rules change suggestion based on these raids. Can the game be changed in some way whereby cavalry units alone cannot change the possession of a town to their side, and thereby restock and resupply themselves infinitely on an ahistorical, 6 month raid through enemy territory? I think that some kind of modification here would make the game better and more historic.