This is a set of miniatures rules for combat involving river boats in the American Civil War, primarily on the lower Mississippi. The Union invaded the South along this route, and the Confederacy tried very hard to stop them.Rules are given for various types of ships (Ironclads and otherwise), forts, field artillery, boarding by infantry, ramming, etc. To give you an idea of scale, the Mississippi is represented as 24'-36' wide on the table (60 - 90 cm). Rules are given for creating terrain with river bends and banks. - BoardGameGeek