24. Lincoln On The Battlefield
President Lincoln was rarely photographed and most of our surviving images of him are either painted or a few remaining studio shots, which is what makes this photograph so special. It captured Lincoln on the battlefield of Antietam, Maryland during the Civil War on October 3rd, 1862, as well as Allan Pinkerton (left) and Major General John A. McClernand (right). Pinkerton went on to essentially invent the Secret Service and McClernand was one of Lincoln’s good friends.