Alternate presents based on alternate pasts are outside the scope of Futuristmovies.com, strictly speaking, but I think CSA is worth mentioning, despite its reported defects.

It retells the story of the last 160 years, beginning with a Civil War in which it is

Grant who surrenders to Lee, allowing the South to rise permanently again and create a parallel America that at times deviates wildly from the historical record and, at other times, bears an uncomfortable resemblance to the world we know.