What would happen if the plans for Antietam hadn't been found in the Civil War?

Question

IT's for a social studies project. Best theory get 10 points!

Answer 1

I don't think it would really make a difference.

Answer 2

My opinion is that the war may have lasted longer, but it was inevitable that the North would prevail.

Available and renewable resources usually determine the outcome of a war.  And, the North had those resources.  The South did not.