Notes from Fort Sumter: Explore the grounds of Fort Sumter. Stand on the grounds where America’s deadliest war began at Fort Sumter and Fort Moultrie National Historical Park. The first shots were fired here, igniting a conflict that saw more than 700,000 casualties. Experience the opening battle of the American Civil War and explore its origins with a National Park ranger. Your approximate one-hour visit to Fort Sumter allows ample time to explore well-preserved fort ruins and browse Museum Store souvenirs.