Ft. Stewart is home to the 3rd infantry division. Also close by and in Savannah is Hunter Army Airfield, which is home to 1st battalion, 75th Ranger Regiment amongst others.
http://www.stewart.army.mil/haaf/
http://www.stewart.army.mil/homepage/default.asp
Savannah is also home to the Federal Training Center for a ton of alphabet agencies. Then there’s the submarine base down the road. Interesting.