Let's assume that Fort McClellan, AL is still open. Given that, its in Anniston, Alabama. Its a flat area surrounded by beautiful mountains.
The closing scenes were from Savannah Georgia salt marshes. Locals! You guessed it! The closing scene is from Georgia State Historic Site -- Wormsloe. The tabby gates are authentic and the oak trees were planted by a colonial farmer when his first son was born in the new world. The next scene is of salt marshes--at another Georgia State Park! Skidaway Island. Also, Savannah.
Bad Geography! in my opinion