The Battle of Bloody Marsh took place on 7 July 1742 between Spanish and British forces on St. Simons Island, part of the Province of Georgia, resulting in a victory for the British. Part of the War of Jenkins' Ear, the battle was for the British fortifications of Fort Frederica and Fort St. Simons, with the strategic goal the sea routes and inland waters they controlled. With the victory, the Province of Georgia established undisputed claim to the island. The British also won the Battle of Gully Hole Creek, which took place on the island the same day.

St. Simons Island is a barrier island and census-designated place (CDP) located on St. Simons Island in Glynn County, Georgia, United States. The names of the community and the island are interchangeable, known simply as "St. Simons Island" or "SSI", or locally as "The Island". St. Simons is part of the Brunswick metropolitan statistical area, and according to the 2020 U.S. census, the CDP had a population of 14,982. Located on the southeast Georgia coast, midway between Savannah and Jacksonville, St. Simons Island is both a seaside resort and residential community. It is the largest of Georgia's renowned Golden Isles. Visitors are drawn to the Island for its warm climate, beaches, variety of outdoor activities, shops and restaurants, historical sites, and natural environment.