I know this is an old message but I was just reviewing some photos I took at the Burnett Cemetery and have found one of the George Hoffman's.
Pvt Co K / 16 Iowa Infantry
April 28, 1829 to September 15, 1911
Looking at the Company K files, I found the following:
HOFFMAN, George. (Veteran.) Age 33. Residence Boone County, nativity Indiana. Enlisted Feb. 7, 1862. Mustered Feb. 20, 1862. Re-enlisted and re-mustered March 11, 1864. Missing in action July 22, 1864, Atlanta, Ga. Mustered out July 19, 1865, Louisville, Ky.