Mississippi Fortress is the fifth game in CoA's Civil War Campaigns series. The game is a two player strategic simulation of General Ulysses S. Grant's campaign of 29 April through 4 July 1863 that culminated in the capture of the capture of Vicksburg and the splitting of the Confederacy. The Union forces are powerful but initially weaker than the total rebel strength, yet forced to take the offensive. The two Confederate armies are widely separated at first, but can form a decisive mass if they can link up. The game map depicts the theater of operations in the central Mississippi. It is divided into areas, stretching from Bruinsburg to Jackson. Each map area serves to regulate movement and combat and represents a fourteen mile square of terrain. The two campaign game scenarios cover the period between 29 April and 4 July 1863 using two day turns. A smaller scenario covers the key maneuvering and combat that took place at Champion Hill. Special rules cover the weather, Union gunboats and rebel shore batteries, the siege of Vicksburg, among other things. Game contents include one 17 inch by 22 inch full-color game map, 240 die-cut game counters, one standard rules book, one exclusive rules book, one battle board, one game card, two army display sheets, and one die.