High panning aerial shot of historic Fort Moultrie along the Atlantic Ocean on Sullivan's Island, South Carolina

fort moultrie sullivans island naval fort coastal fortress atlantic coast drone charleston harbor coastal defense american history civil war history charleston american civil war military fortification defense architecture historic landmarks civil war landmarks island fort island fortress atlantic ocean coastal fortresses historic site fortified bunker american battlefield patriotism battery jasper south carolina history aerial patriots military forts underground bunker coastal forts gun batteries military history william moultrie hazy day harbor defense historic artillery fort sumter palmetto state military legacy low visibility south carolina bastions ramparts national park 4k 24 fps high shot panning shot