Fort Sumter is a sea fort built on an artificial island near Charleston, South Carolina to defend the region from a naval invasion. It was built after British forces captured and occupied Washington during the War of 1812 via a naval attack. The fort was still incomplete in 1861 when the Battle of Fort Sumter occurred, sparking the American Civil War. It was severely damaged during the battle and left in ruins. Although there were some efforts at reconstruction after the war, the fort as conceived was never completed. Since the middle of the 20th century, Fort Sumter has been open to the public as part of the Fort Sumter and Fort Moultrie National Historical Park, operated by the National Park Service.