This battle was fought on September 17, 1863. This was the first major war in the Civil War to take on Union soil, this was the single most bloodiest battle in American history there was about 22,717 dead, wounded or missing. The Union followed the Confederate into Maryland and then General of the Union started to launch attacks on the Confederate army. In the end the union won the Battle of Antietam because the Confederates were outnumbered and unprepared. In the movie The Blue and The Gray John had very gruesome dreams about this battle and it was shown in his drawings and dreams.