On the first day of July, in 1863, the Union and Confederate soldiers clashed in the bloodiest battle of the American Civil War. There were over 46,000 casualties in the battle, and 7,500 soldiers died during combat. Tragedy is said to fuel the paranormal, and Gettysburg is no different. It is considered one of the most haunted cities in America. Here are several sites you must see if you're searching for spirits trapped on the battlefield.