The bluff where Fort King George stood had drawn human inhabitants for thousands of years before the British arrived. Native Americans had lived there long before the Spanish established the mission of Santo Domingo de Talaje on the site in the early seventeenth century. By the 1720s, the Altamaha River region had become a contested no-man's-land where three European empires collided. Spain held St. Augustine to the south, founded in 1565 to protect its treasure fleets. France was expanding from Louisiana into the Gulf Coast, chasing the fur trade. Britain, pressing south from its Carolina colonies, needed to control the Altamaha to secure both the lucrative trade with the Creek and Muscogee peoples and a buffer against Spanish Florida. Colonel John Barnwell, a South Carolina imperialist who championed the fort's construction, drew a map in 1721 showing two roads leading from the site: one north toward the Carolina settlements and one along the river to a Muscogee trading path. The fort was not merely a military position. It was a commercial gateway.

The garrison sent to hold this strategic position was spectacularly ill-suited for the task. The Independent Company of South Carolina consisted of one hundred elderly British Regulars -- an "invalid" company, as such units were called, composed of soldiers too old or infirm for front-line service. They arrived at a site that flooded regularly, lacked adequate provisions, and offered no defense against the mosquitoes that carried malaria through the surrounding marsh. Poor sanitation compounded their suffering. The soldiers' commander, Colonel Barnwell himself, was among those who died at the post. Alcoholism and desertion plagued the garrison. At various points, the troops came close to outright mutiny. Supply ships arrived infrequently, and when they did, the provisions were often inadequate. The soldiers were, in effect, abandoned at the edge of the empire they had been sent to defend.

Fort King George was abandoned in 1727, but its strategic logic survived. When General James Oglethorpe arrived in 1733 to establish the colony of Georgia, he studied Barnwell's earlier defensive plans closely. In 1736, Oglethorpe brought Scottish Highlanders to settle the site of the ruined fort. They named their village New Inverness, later called Darien. That same year, Oglethorpe built Fort Frederica on nearby St. Simons Island, creating the southern defense system that Barnwell had envisioned but never lived to see completed. Oglethorpe borrowed extensively from the ideas laid out by Barnwell, Joseph Bowdler, and Francis Nicholson when they planned Fort King George as part of a chain of fortifications controlling the Altamaha. By 1738, Oglethorpe decided to dismantle what remained of the original fort, its purpose absorbed into the broader defensive network of the new colony.

Today, Fort King George is operated as a state historic site by the Georgia Department of Natural Resources. The fort has been reconstructed on its original footprint, including a blockhouse, officers' quarters, barracks, guardhouse, baking and brewing house, blacksmith shop, moat, and palisades. But the site tells a story far deeper than the British period. The park's museum traces the cultural history of the bluff from its Native American inhabitants through the Spanish mission period, the British fort, the Scottish settlement at Darien, and the nineteenth-century sawmilling industry that left the ruins of two mills and tabby cement structures on the property. Tabby, a regional building material made from oyster shells, lime, sand, and water, is visible throughout the grounds. Living history programs run year-round, bringing interpreters in period dress to demonstrate the daily routines -- and daily struggles -- of the garrison that held this outpost at the far southern reach of British ambition.