One (big) reason why this movie bombed...
Would the general public be able to answer these questions?...especially the primary audience that attend movies- pre-teens, teens, and college age kids:
1. Who were the opposing sides in the American Civil War?
2. When was the American Civil War?
3. Name at least two leaders of each side.
Would even a majority of the group cited be able to answer those questions? Based on what I have seen from time to time when asked simple questions about American history...it is doubtful. And having no basic knowledge of that war, how could they even relate to FSOJ?