The 19th century witnessed major advancements, like the invention of photography. It also saw major conflict, including the most violent one ever seen in the United States. Discover how Civil War photographers helped to advance medicine, surgery, and the way the American public viewed war at our link in bio. 📷 President Lincoln, United States Headquarters, Army of the Potomac, near Antietam, October 4, 1862, Alexander Gardner. Getty Museum