It contains 20 new scenarios; 12 made by the expansion pack developers, and 8 "Best of the Net" scenarios created by series fans... The majority of battles in the scenarios are based on genuine historical events, such as the American Civil War, Alexander the Great's conquests, the Crusades and World War I. However, there are also a few fantasy scenarios including the stopping of an alien invasion, and surviving after a nuclear apocalypse. (wikipedia.org)