Snow's Island is an area of swampy lowlands along the Pee Dee River in Florence County, South Carolina. The area is historically significant as the headquarters during the American Revolutionary War for forces led by Francis Marion (1732-1795), a South Carolina militia officer who is celebrated as the "Swamp Fox." Employing guerrilla war tactics, Marion significantly contributed to the American war effort by conducting numerous raids on British outposts." The site was declared a National Historic Landmark in 1974.