Fort Moultrie is a historic coastal fort located on Sullivan's Island, South Carolina. It was originally built in 1776 and played a significant role in the American Revolutionary War. The fort was named after Colonel William Moultrie, who led the defense against British forces during the Battle of Sullivan's Island. Over the years, Fort Moultrie underwent several renovations and expansions, serving in various conflicts, including the Civil War. Today, it is part of the Fort Sumter National Historical Park and is open to the public, offering visitors insights into its military history and the coastal defense strategies of the time.