Oddly enough, despite having 1000 or so Union troops just 10 miles from Savannah, Savannah itself wasn't ever conquered/evacuated until General Sherman's March to the Sea (when he burned Atlanta and wrecked havoc to Georgia). So this fort was a Union fort completely surrounded by the Confederacy for most of the war.
On a related note, I'm of the opinion that traveling alone sucks. Maybe some people like it, but count me out. I think traveling should be done with a friend. Nevertheless, while in the Mellow Mushroom, this hippie pizza place here in Savannah, I read the following quote from St. Augustine:
"People travel to wonder at the height of the mountains, at the huge waves of the sea, at the long courses of rivers, at the vast compass of the ocean, at the circular motion of the stars, and they pass by themselves without wondering."
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