Birthplace of first aid and emergency medicine! The Pry House was the headquarters of the U.S. Army during the Battle of Antietam in September 1862. Dr. Jonathan Letterman began his reorganization of the medical department that has been adopted world wide. Come explore the challenges of military medicine and civilian participation during the war and the inovations that continue to impact people world-wide. Civil War medical artifacts, special events, programs and tours, including a new unique view of Antietam National Battlefield.