C.S.A. is a simulation game of the American Civil war. The USA player controls the Union side and the CSA player controls the Confederate side. The Game contains the rulebook, 288 counters, one color map and 10 sheets of charts and tables.

The game uses Ben Madison and Wes Erni's "Charles S. Roberts Award" winning Death in the Trenches: The Great War, 1914-1918 system to simulate the American Civil War. Units represent Generals (their component brigades are represented off-map), elite units (Iron Brigade, Cobb's Legion), cavalry (Stuart, Stoneman), guerillas (Quantrill, Kirk), and Indians (Choctaws, Delawares, Stand Watie). Like Death in the Trenches: The Great War, 1914-1918 random events and "Special Event Coins" are crucial, and there are about 400 (yes, 400) of them.