On Sunday, explosives experts were dispatched to Folly Island, South Carolina, after a resident found what appeared to be at least a dozen Civil War cannonballs uncovered by Hurricane Matthew.

During the Civil War, Folly Island served as a key staging area for Union troops attacking nearby Fort Morris. Since then, remnants of the occupation have periodically been discovered in the area, including a black regimental cemeteryfound during a construction project in 1987 and military artifacts uncovered by Hurricane Hugo in 1989.