What if they remade An Occurrence at Owl Creek Bridge and nobody came? It was done and received its premier in 2003, but information on this picture is scarce. In the same vein here is an account of an earlier version of the film that seems to have gone wrong and not been finished.
Small Civil War movies make economic sense to me. There are audiovisual facilities in battlefield parks; there are distribution possibilities in Civil War retail channels; there are roundtables; re-enactor regiments; etc., etc.
Big ACW movies fail, being out of scale. So why do little ones fail?