The Fort Johnson Historic District is located on James Island, South Carolina. It is recognized for its historical significance, particularly during the American Revolutionary War and the Civil War. The district includes the remains of the original fort, which was built in the 1700s, and various structures that reflect the area's military history. Today, the district serves as a reminder of the region's past and is part of the larger narrative of Charleston and its strategic importance. Visitors can explore the site, which is preserved to honor the contributions of the fort and its role in American history.