Your right there my friend. The American Civil War is the last great historical era that is relativley untouched by Civilization II. There have been a couple famous versions, the original Civ II Scenario's expansion disc version, Captain Nemo's groud breaking version and most recently Fairline's updated version of Nemo's.
Still, it has seen far less interest than WW2 of course, for at any given moment there are at least three WW2 scenario's in development here at Apolyton. Heck, Steph alone has made five versions of the First World War, when you throw in Kaiser you have no shortage of Great War scenario's to choose from. Pablo's given us the best Spanish Civil War scenario, though there are a handfull of others to choose from. There have been a couple based on the Boer War, the era of African Expansion, Brown Man's Burden and such. There have even been some great modern games about the global imperialistic expansion of the late nineteench century and early twentieth in Imperialism 1870 and La Belle Epoque. Yet the American Civil War remains relativley untouched territoriy for Civ II designers.
Hopefully your right Leonidas and that will all soon change .