This subreddit avoids the "What If" type questions.

You may want to ask at /r/historywhatif , although I expect that the American Civil War is a common topic.

Sorry, but your submission has been removed because we don't allow hypothetical questions. If possible, please feel free to rephrase the question so that it does not call for such speculation, and resubmit Otherwise, this sort of thing is better suited for /r/HistoryWhatIf.