South Carolina in 1670, warfare increased between the English and their pirate allies and the Spanish and their Native American allies. In 1702, James Moore of South Carolina led an invasion of Spanish Florida with an Indian army and a fleet of militia-manned ships. The invasion failed to take the capital of Florida, St. Augustine, but did destroy the Guale and Mocama missionary provinces. After another invasion of Spanish Florida by South Carolina in 1704, the Spanish retreated to St. Augustine and Pensacola; the Sea Islands were depopulated, allowing the establishment of new English settlements such as the colony of Georgia. Lighthouse Tybee Island's strategic position near the mouth of the Savannah River has made the island's northern tip the ideal location for a lighthouse since Georgia's early settlement period. First built in 1736, the lighthouse was made of brick and wood, and stood tall, making it the highest structure in America at that time. The original lighthouse has been replaced several times. The second lighthouse was built in 1742 when beach erosion threatened the first. Part of the third lighthouse at the site, built in 1773, still stands as the bottom of the present lighthouse. The top of the current lighthouse were added in 1867. Today, the Tybee Lighthouse is a popular tourist destination, having all of its support buildings on the site historically preserved. The current black-and-white tower markings are a reversion to its fourth day mark, first used in 1916. The Tybee Island Light Station is one of just a handful of 18th-century lighthouses still in operation in North America. Civil War During the Civil War, the Union Army placed siege batteries along the north coast of Tybee Island that aided in their successful bombardment and capture of Fort Pulaski on April 10–11, 1862. This was the first significant use of rifled cannons against masonry fortifications and demonstrated that masonry fortifications were obsolete. Recently, the City of Tybee Island has taken action to commemorate Tybee's historic significance in the Civil War. In 2005, the city obtained a federal grant to acquire two tracts of land where Union soldiers launched their attack against Fort Pulaski. Fort Screven historic district Fort Screven was first commissioned in 1898 and was named for Brigadier General James Screven, a Revolutionary War hero who was killed in action near Midway, Georgia, in 1778. The fort served as a valuable part of coastal defense