Fort King George State Historic Site in Darien marks the first English fortification on the Georgia coast, built in 1721 by Colonel John "Tuscarora Jack" Barnwell under orders from King George. From 1721 to 1727, the fort served as the southernmost British outpost in North America. The garrison endured severe hardships from disease, Spanish and Indian threats, and the harsh coastal environment; approximately 140 officers and men died during its occupation. The modern site features a reconstructed cypress blockhouse, barracks, guardhouse, and palisades, alongside a museum covering Native American history, Spanish missions, and Darien's later role as a major seaport.